java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:14:20,778 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:14:20,780 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:14:20,795 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:14:20,795 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:14:20,796 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:14:20,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:14:20,799 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:14:20,801 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:14:20,801 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:14:20,802 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:14:20,826 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 20:14:20,846 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:14:20,847 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:14:20,847 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:14:20,848 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:14:20,848 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:14:20,848 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:14:20,849 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:14:20,849 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:14:20,849 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:14:20,849 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:14:20,849 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:14:20,850 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:14:20,850 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:14:20,850 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:14:20,850 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:14:20,850 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:14:20,851 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:14:20,851 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:14:20,851 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:14:20,851 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:14:20,852 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:14:20,852 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:14:20,852 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:14:20,852 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:14:20,852 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:14:20,852 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:14:20,853 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:14:20,853 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:14:20,853 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:14:20,853 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:14:20,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:14:20,930 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:14:20,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:14:20,938 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:14:20,939 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:14:20,939 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-09-30 20:14:20,940 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-09-30 20:14:20,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:14:21,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:14:21,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:14:21,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:14:21,003 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:14:21,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:14:21,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:14:21,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:14:21,047 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:14:21,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/1) ... [2018-09-30 20:14:21,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:14:21,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:14:21,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:14:21,074 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:14:21,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (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 20:14:21,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:14:21,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:14:21,386 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:14:21,386 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:14:21 BoogieIcfgContainer [2018-09-30 20:14:21,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:14:21,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:14:21,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:14:21,391 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:14:21,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:20" (1/2) ... [2018-09-30 20:14:21,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddef99f and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:14:21, skipping insertion in model container [2018-09-30 20:14:21,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:14:21" (2/2) ... [2018-09-30 20:14:21,395 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bpl [2018-09-30 20:14:21,406 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:14:21,414 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:14:21,465 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:14:21,466 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:14:21,466 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:14:21,467 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:14:21,467 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:14:21,467 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:14:21,467 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:14:21,467 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:14:21,468 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:14:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:14:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:14:21,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:21,491 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:14:21,492 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:21,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:21,499 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:14:21,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:21,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:21,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:21,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:21,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:21,768 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-09-30 20:14:21,771 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 20:14:21,774 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:14:21,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:14:21,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:14:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:14:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:14:21,799 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:14:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:21,847 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:14:21,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:14:21,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:14:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:21,862 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:14:21,862 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:14:21,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:14:21,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:14:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:14:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:14:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:14:21,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:14:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:21,925 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:14:21,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:14:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:14:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:14:21,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:21,926 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:14:21,927 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:21,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 20:14:21,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:21,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:21,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:21,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:21,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:22,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:22,048 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 20:14:22,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:22,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:22,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:22,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 20:14:22,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:14:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:14:22,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:14:22,334 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-09-30 20:14:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:22,492 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 20:14:22,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:14:22,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-09-30 20:14:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:22,494 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:14:22,495 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:14:22,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:14:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:14:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:14:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:14:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:14:22,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-09-30 20:14:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:22,504 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:14:22,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:14:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:14:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:14:22,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:22,505 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:14:22,506 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:22,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 2 times [2018-09-30 20:14:22,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:22,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:22,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:22,677 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 20:14:22,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:22,678 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 20:14:22,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:22,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:22,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:22,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:22,776 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 20:14:22,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:22,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 20:14:22,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:14:22,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:14:22,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:14:22,799 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-09-30 20:14:23,050 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-09-30 20:14:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:23,248 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 20:14:23,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:14:23,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 20:14:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:23,249 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:14:23,250 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:14:23,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:14:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:14:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:14:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:14:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:14:23,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-09-30 20:14:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:23,257 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:14:23,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:14:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:14:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:14:23,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:23,258 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:14:23,258 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:23,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:23,259 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 3 times [2018-09-30 20:14:23,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:23,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:23,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:23,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:23,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:23,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:23,400 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 20:14:23,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:23,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:14:23,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:23,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:23,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:23,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 20:14:23,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:14:23,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:14:23,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:14:23,597 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2018-09-30 20:14:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:23,886 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 20:14:23,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:14:23,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-09-30 20:14:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:23,888 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:14:23,888 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:14:23,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:14:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:14:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:14:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:14:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:14:23,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-09-30 20:14:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:23,896 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:14:23,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:14:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:14:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:14:23,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:23,897 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:14:23,897 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:23,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 4 times [2018-09-30 20:14:23,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:23,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:23,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:23,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:23,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:24,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:24,433 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 20:14:24,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:24,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:24,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:24,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:24,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:24,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 20:14:24,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:14:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:14:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:14:24,555 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2018-09-30 20:14:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:24,829 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 20:14:24,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:14:24,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 20:14:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:24,831 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:14:24,832 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:14:24,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:14:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:14:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:14:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:14:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:14:24,840 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-09-30 20:14:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:24,840 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:14:24,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:14:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:14:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:14:24,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:24,842 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:14:24,842 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:24,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:24,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 5 times [2018-09-30 20:14:24,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:24,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:24,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:24,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:24,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:25,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:25,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:14:25,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:25,710 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:14:25,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:25,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:25,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:25,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 20:14:25,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:14:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:14:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:14:25,786 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 13 states. [2018-09-30 20:14:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:26,238 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 20:14:26,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:14:26,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2018-09-30 20:14:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:26,241 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:14:26,241 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:14:26,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:14:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:14:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:14:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:14:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:14:26,250 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-09-30 20:14:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:26,250 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:14:26,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:14:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:14:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:14:26,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:26,252 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 20:14:26,252 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:26,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 6 times [2018-09-30 20:14:26,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:26,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:26,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:26,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:26,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:26,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:26,530 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 20:14:26,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:26,552 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 20:14:26,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:26,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:26,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:26,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 20:14:26,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:14:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:14:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:14:26,620 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2018-09-30 20:14:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:27,234 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 20:14:27,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:14:27,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-09-30 20:14:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:27,236 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:14:27,236 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:14:27,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:14:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:14:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:14:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:14:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:14:27,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-09-30 20:14:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:27,245 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:14:27,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:14:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:14:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:14:27,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:27,246 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 20:14:27,247 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:27,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 7 times [2018-09-30 20:14:27,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:27,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:27,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:27,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:27,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:27,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:27,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:14:27,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:27,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:27,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:27,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 20:14:27,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:14:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:14:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:14:27,583 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-09-30 20:14:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:28,323 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 20:14:28,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:14:28,327 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-30 20:14:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:28,328 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:14:28,328 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:14:28,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:14:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:14:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:14:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:14:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:14:28,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-09-30 20:14:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:28,340 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:14:28,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:14:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:14:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:14:28,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:28,341 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 20:14:28,342 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:28,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 8 times [2018-09-30 20:14:28,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:28,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:28,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:28,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:28,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:29,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:29,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:14:29,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:29,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:29,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:29,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:29,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:29,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 20:14:29,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:14:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:14:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:14:29,177 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2018-09-30 20:14:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:29,985 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 20:14:29,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:14:29,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2018-09-30 20:14:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:29,987 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:14:29,987 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:14:29,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:14:29,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:14:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:14:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:14:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:14:29,996 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-09-30 20:14:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:29,997 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:14:29,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:14:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:14:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:14:29,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:29,998 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 20:14:29,998 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:29,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 9 times [2018-09-30 20:14:29,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:29,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:30,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:30,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:30,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:30,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:30,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:14:30,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:30,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:14:30,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:30,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:30,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:30,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 20:14:30,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:14:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:14:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:14:30,575 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 21 states. [2018-09-30 20:14:31,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:31,565 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 20:14:31,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:14:31,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2018-09-30 20:14:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:31,567 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:14:31,567 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:14:31,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:14:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:14:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:14:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:14:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:14:31,578 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-09-30 20:14:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:31,579 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:14:31,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:14:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:14:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:14:31,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:31,583 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 20:14:31,584 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:31,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 10 times [2018-09-30 20:14:31,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:31,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:31,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:31,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:31,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:31,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:31,959 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 20:14:31,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:31,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:31,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:31,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:32,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:32,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 20:14:32,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:14:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:14:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:14:32,050 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 23 states. [2018-09-30 20:14:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:33,040 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 20:14:33,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:14:33,040 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2018-09-30 20:14:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:33,041 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:14:33,041 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:14:33,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:14:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:14:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:14:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:14:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:14:33,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-09-30 20:14:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:33,052 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:14:33,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:14:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:14:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:14:33,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:33,054 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 20:14:33,054 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:33,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 11 times [2018-09-30 20:14:33,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:33,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:33,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:33,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:33,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:33,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:33,471 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 20:14:33,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:33,535 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:14:33,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:33,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:33,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:33,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 20:14:33,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:14:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:14:33,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:14:33,625 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 25 states. [2018-09-30 20:14:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:34,681 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 20:14:34,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:14:34,682 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2018-09-30 20:14:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:34,683 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:14:34,683 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:14:34,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:14:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:14:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:14:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:14:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:14:34,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-09-30 20:14:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:34,692 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:14:34,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:14:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:14:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:14:34,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:34,693 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 20:14:34,693 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:34,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 12 times [2018-09-30 20:14:34,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:34,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:34,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:35,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:35,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:14:35,168 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:35,197 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 20:14:35,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:35,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:35,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:35,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 20:14:35,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:14:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:14:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:14:35,285 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 27 states. [2018-09-30 20:14:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:36,719 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 20:14:36,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:14:36,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2018-09-30 20:14:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:36,720 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:14:36,720 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:14:36,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:14:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:14:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:14:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:14:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:14:36,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-09-30 20:14:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:36,731 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:14:36,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:14:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:14:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:14:36,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:36,732 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 20:14:36,732 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:36,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:36,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 13 times [2018-09-30 20:14:36,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:36,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:36,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:36,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:36,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:37,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:37,421 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 20:14:37,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:37,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:37,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:37,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 20:14:37,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:14:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:14:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:14:37,612 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 29 states. [2018-09-30 20:14:37,931 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-09-30 20:14:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:39,313 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 20:14:39,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:14:39,313 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2018-09-30 20:14:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:39,315 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:14:39,315 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:14:39,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:14:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:14:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:14:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:14:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:14:39,325 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-09-30 20:14:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:39,325 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:14:39,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:14:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:14:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:14:39,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:39,327 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 20:14:39,327 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:39,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 14 times [2018-09-30 20:14:39,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:39,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:39,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:39,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:39,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:39,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:39,886 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 20:14:39,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:39,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:39,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:39,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:40,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:40,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 20:14:40,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:14:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:14:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:14:40,063 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 31 states. [2018-09-30 20:14:41,140 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-09-30 20:14:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:42,199 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 20:14:42,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:14:42,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2018-09-30 20:14:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:42,201 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:14:42,201 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:14:42,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:14:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:14:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:14:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:14:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:14:42,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-09-30 20:14:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:42,213 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:14:42,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:14:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:14:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:14:42,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:42,215 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 20:14:42,215 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:42,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 15 times [2018-09-30 20:14:42,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:42,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:42,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:42,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:42,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:43,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:43,140 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 20:14:43,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:43,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 20:14:43,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:43,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:43,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:43,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 20:14:43,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:14:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:14:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:14:43,312 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 33 states. [2018-09-30 20:14:45,518 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-09-30 20:14:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:46,122 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 20:14:46,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:14:46,123 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2018-09-30 20:14:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:46,124 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:14:46,124 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:14:46,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:14:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:14:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:14:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:14:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:14:46,134 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-09-30 20:14:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:46,135 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:14:46,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:14:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:14:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:14:46,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:46,136 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 20:14:46,136 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:46,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 16 times [2018-09-30 20:14:46,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:46,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:46,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:46,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:46,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:46,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:46,794 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 20:14:46,801 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:46,888 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:46,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:46,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:47,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:47,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 20:14:47,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:14:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:14:47,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:14:47,021 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2018-09-30 20:14:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:49,115 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 20:14:49,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:14:49,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2018-09-30 20:14:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:49,116 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:14:49,116 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:14:49,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:14:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:14:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:14:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:14:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:14:49,128 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-09-30 20:14:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:49,128 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:14:49,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:14:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:14:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:14:49,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:49,129 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 20:14:49,130 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:49,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:49,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 17 times [2018-09-30 20:14:49,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:49,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:49,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:49,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:49,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:50,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:50,058 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 20:14:50,065 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:50,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:14:50,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:50,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:50,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:50,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 20:14:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:14:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:14:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:14:50,245 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 37 states. [2018-09-30 20:14:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:52,642 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 20:14:52,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:14:52,643 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2018-09-30 20:14:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:52,644 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:14:52,644 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:14:52,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:14:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:14:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:14:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:14:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:14:52,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-09-30 20:14:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:52,652 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:14:52,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:14:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:14:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:14:52,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:52,654 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 20:14:52,654 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:52,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:52,654 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 18 times [2018-09-30 20:14:52,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:52,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:52,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:52,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:52,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:53,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:53,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:14:53,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:54,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-09-30 20:14:54,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:54,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:54,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:54,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 20:14:54,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:14:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:14:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:14:54,101 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 39 states. [2018-09-30 20:14:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:56,933 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 20:14:56,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:14:56,933 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2018-09-30 20:14:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:56,934 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:14:56,935 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:14:56,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:14:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:14:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:14:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:14:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:14:56,942 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-09-30 20:14:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:56,943 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:14:56,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:14:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:14:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:14:56,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:56,947 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 20:14:56,948 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:56,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 19 times [2018-09-30 20:14:56,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:56,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:56,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:56,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:56,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:57,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:57,805 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 20:14:57,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:57,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:58,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:58,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 20:14:58,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:14:58,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:14:58,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:14:58,073 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 41 states. [2018-09-30 20:15:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:01,273 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 20:15:01,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:15:01,274 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 78 [2018-09-30 20:15:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:01,275 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:15:01,275 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:15:01,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:15:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:15:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:15:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:15:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:15:01,282 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-09-30 20:15:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:01,282 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:15:01,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:15:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:15:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:15:01,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:01,283 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 20:15:01,283 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:01,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 20 times [2018-09-30 20:15:01,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:01,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:01,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:01,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:01,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:02,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:02,249 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 20:15:02,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:02,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:02,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:02,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:02,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:02,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 20:15:02,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:15:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:15:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:15:02,528 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 43 states. [2018-09-30 20:15:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:06,146 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 20:15:06,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:15:06,146 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2018-09-30 20:15:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:06,148 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:15:06,148 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:15:06,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:15:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:15:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:15:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:15:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:15:06,157 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-09-30 20:15:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:06,157 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:15:06,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:15:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:15:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:15:06,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:06,158 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 20:15:06,158 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:06,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 21 times [2018-09-30 20:15:06,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:06,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:06,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:06,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:06,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:07,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:07,175 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 20:15:07,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:07,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 20:15:07,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:07,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:07,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:07,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 20:15:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:15:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:15:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:15:07,381 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 45 states. [2018-09-30 20:15:07,908 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-09-30 20:15:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:11,496 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 20:15:11,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:15:11,499 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 86 [2018-09-30 20:15:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:11,500 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:15:11,500 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:15:11,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:15:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:15:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:15:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:15:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:15:11,508 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-09-30 20:15:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:11,508 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:15:11,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:15:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:15:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:15:11,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:11,508 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 20:15:11,509 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:11,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 22 times [2018-09-30 20:15:11,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:11,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:11,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:12,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:12,660 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 20:15:12,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:12,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:12,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:12,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:12,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:12,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 20:15:12,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:15:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:15:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:15:12,826 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 47 states. [2018-09-30 20:15:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:17,276 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 20:15:17,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:15:17,277 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2018-09-30 20:15:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:17,278 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:15:17,278 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:15:17,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:15:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:15:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:15:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:15:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:15:17,286 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-09-30 20:15:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:17,287 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:15:17,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:15:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:15:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:15:17,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:17,288 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 20:15:17,288 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:17,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 23 times [2018-09-30 20:15:17,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:17,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:17,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:17,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:17,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:18,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:18,586 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 20:15:18,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:18,739 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:15:18,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:18,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:18,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:18,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 20:15:18,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:15:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:15:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:15:18,938 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 49 states. [2018-09-30 20:15:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:23,786 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 20:15:23,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:15:23,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 94 [2018-09-30 20:15:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:23,788 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:15:23,788 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:15:23,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:15:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:15:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:15:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:15:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:15:23,795 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-09-30 20:15:23,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:23,795 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:15:23,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:15:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:15:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:15:23,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:23,796 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 20:15:23,797 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:23,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 24 times [2018-09-30 20:15:23,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:23,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:23,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:23,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:23,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:25,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:25,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:15:25,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:25,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2018-09-30 20:15:25,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:25,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:26,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:26,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 20:15:26,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:15:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:15:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:15:26,086 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 51 states. [2018-09-30 20:15:26,321 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-09-30 20:15:26,438 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:15:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:31,472 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 20:15:31,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:15:31,473 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 98 [2018-09-30 20:15:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:31,474 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:15:31,474 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:15:31,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:15:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:15:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:15:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:15:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:15:31,484 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-09-30 20:15:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:31,485 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:15:31,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:15:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:15:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:15:31,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:31,486 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 20:15:31,486 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:31,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 25 times [2018-09-30 20:15:31,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:31,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:31,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:31,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:31,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:32,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:32,886 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 20:15:32,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:33,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:33,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:33,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 20:15:33,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:15:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:15:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:15:33,303 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 53 states. [2018-09-30 20:15:33,428 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-09-30 20:15:33,549 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-09-30 20:15:33,676 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:15:33,804 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:15:33,934 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:15:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:39,188 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 20:15:39,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:15:39,188 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 102 [2018-09-30 20:15:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:39,190 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:15:39,190 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:15:39,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:15:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:15:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:15:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:15:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:15:39,200 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-09-30 20:15:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:39,201 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:15:39,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:15:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:15:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:15:39,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:39,202 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 20:15:39,202 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:39,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 26 times [2018-09-30 20:15:39,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:39,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:39,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:39,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:39,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:41,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:41,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:15:41,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:41,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:41,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:41,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:41,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:41,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 20:15:41,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:15:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:15:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:15:41,517 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 55 states. [2018-09-30 20:15:41,672 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-09-30 20:15:41,795 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-09-30 20:15:41,925 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:15:42,051 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:15:42,187 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:15:42,322 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:15:42,456 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:15:42,737 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 20:15:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:47,980 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 20:15:47,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:15:47,980 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 106 [2018-09-30 20:15:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:47,981 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:15:47,981 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:15:47,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:15:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:15:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:15:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:15:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:15:47,989 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-09-30 20:15:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:47,990 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:15:47,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:15:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:15:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:15:47,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:47,991 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 20:15:47,991 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:47,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:47,991 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 27 times [2018-09-30 20:15:47,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:47,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:47,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:47,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:47,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:49,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:49,579 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 20:15:49,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:49,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 20:15:49,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:49,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:49,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:49,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 20:15:49,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:15:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:15:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:15:49,784 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 57 states. [2018-09-30 20:15:49,927 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-09-30 20:15:50,083 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-09-30 20:15:50,221 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:15:50,356 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:15:50,495 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:15:50,651 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:15:50,807 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:15:50,962 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:15:51,106 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:15:51,256 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:15:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:56,919 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-30 20:15:56,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:15:56,919 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 110 [2018-09-30 20:15:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:56,921 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:15:56,921 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:15:56,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:15:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:15:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:15:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:15:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:15:56,930 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-09-30 20:15:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:56,931 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:15:56,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:15:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:15:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:15:56,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:56,931 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 20:15:56,932 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:56,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 28 times [2018-09-30 20:15:56,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:56,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:56,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:56,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:56,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:58,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:58,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:15:58,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:58,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:58,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:58,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:59,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:59,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 20:15:59,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:15:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:15:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:15:59,126 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 59 states. [2018-09-30 20:15:59,277 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-09-30 20:15:59,419 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-09-30 20:15:59,566 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:15:59,716 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:15:59,866 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:16:00,007 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:16:00,153 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:16:00,302 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:16:00,459 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:16:00,623 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:16:00,793 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:16:00,964 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:16:01,130 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-09-30 20:16:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:07,300 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-30 20:16:07,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:16:07,302 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2018-09-30 20:16:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:07,303 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:16:07,303 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:16:07,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:16:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:16:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:16:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:16:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:16:07,312 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-09-30 20:16:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:07,313 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:16:07,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:16:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:16:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:16:07,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:07,314 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 20:16:07,314 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:07,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:07,314 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 29 times [2018-09-30 20:16:07,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:07,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:07,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:07,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:07,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:09,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:09,136 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 20:16:09,144 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:16:09,404 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 20:16:09,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:09,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:09,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:09,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 20:16:09,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:16:09,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:16:09,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:16:09,570 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 61 states. [2018-09-30 20:16:09,728 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-09-30 20:16:09,879 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-09-30 20:16:10,040 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:16:10,198 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:16:10,355 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:16:10,504 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:16:10,658 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:16:10,816 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:16:10,978 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:16:11,151 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:16:11,325 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:16:11,491 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:16:11,660 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:16:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:18,203 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-30 20:16:18,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:16:18,204 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 118 [2018-09-30 20:16:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:18,205 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:16:18,205 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:16:18,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:16:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:16:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:16:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:16:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:16:18,216 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-09-30 20:16:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:18,217 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:16:18,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:16:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:16:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:16:18,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:18,218 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 20:16:18,218 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:18,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 30 times [2018-09-30 20:16:18,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:18,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:18,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:18,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:18,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:20,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:20,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:16:20,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:16:20,643 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 60 check-sat command(s) [2018-09-30 20:16:20,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:20,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:20,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:20,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 20:16:20,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:16:20,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:16:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:16:20,828 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 63 states. [2018-09-30 20:16:20,990 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-09-30 20:16:21,145 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-09-30 20:16:21,331 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:16:21,521 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:16:21,698 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:16:21,857 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:16:22,020 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:16:22,181 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:16:22,350 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:16:22,552 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:16:22,726 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:16:22,900 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:16:23,068 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:16:23,411 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:16:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:30,036 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-30 20:16:30,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:16:30,036 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 122 [2018-09-30 20:16:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:30,037 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:16:30,037 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:16:30,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:16:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:16:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:16:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:16:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:16:30,046 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-09-30 20:16:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:30,047 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:16:30,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:16:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:16:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:16:30,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:30,048 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 20:16:30,048 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:30,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 31 times [2018-09-30 20:16:30,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:30,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:30,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:30,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:30,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:32,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:32,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:16:32,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:32,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:33,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:33,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 20:16:33,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:16:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:16:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:16:33,010 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 65 states. [2018-09-30 20:16:33,183 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-09-30 20:16:33,351 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-09-30 20:16:33,520 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:16:33,689 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:16:33,871 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:16:34,034 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:16:34,204 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:16:34,381 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:16:34,567 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:16:34,745 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:16:34,934 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:16:35,106 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:16:35,279 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:16:35,455 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:16:35,640 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:16:36,773 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-09-30 20:16:36,994 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-09-30 20:16:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:43,007 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-30 20:16:43,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:16:43,007 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 126 [2018-09-30 20:16:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:43,008 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:16:43,009 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:16:43,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 20:16:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:16:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:16:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:16:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:16:43,018 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-09-30 20:16:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:43,019 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:16:43,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:16:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:16:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:16:43,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:43,020 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 20:16:43,020 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:43,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:43,020 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 32 times [2018-09-30 20:16:43,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:43,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:43,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:43,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:43,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:45,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:45,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:16:45,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:16:45,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:16:45,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:45,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:46,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:46,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 20:16:46,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:16:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:16:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:16:46,123 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 67 states. [2018-09-30 20:16:46,331 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-09-30 20:16:46,502 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-09-30 20:16:46,674 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:16:46,852 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:16:47,047 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:16:47,239 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:16:47,424 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:16:47,606 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:16:47,799 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:16:47,989 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:16:48,183 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:16:48,371 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:16:48,556 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:16:48,740 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:16:48,943 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:16:49,137 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:16:49,525 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:16:49,731 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:16:49,932 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:16:53,329 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 11 [2018-09-30 20:16:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:56,865 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-30 20:16:56,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:16:56,865 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 130 [2018-09-30 20:16:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:56,867 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:16:56,867 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:16:56,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:16:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:16:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:16:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:16:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:16:56,878 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-09-30 20:16:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:56,878 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:16:56,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:16:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:16:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:16:56,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:56,879 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 20:16:56,880 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:56,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 33 times [2018-09-30 20:16:56,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:56,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:56,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:59,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:59,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:16:59,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:16:59,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 20:16:59,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:59,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:59,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:59,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 20:16:59,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:16:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:16:59,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:16:59,958 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 69 states. [2018-09-30 20:17:00,216 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-09-30 20:17:00,392 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-09-30 20:17:00,575 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:17:00,767 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:17:00,957 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:17:01,150 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:17:01,341 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:17:01,536 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:17:01,736 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:17:01,942 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:17:02,152 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:17:02,371 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:17:02,586 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:17:02,780 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:17:02,985 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:17:03,202 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:17:03,409 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:17:03,619 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:17:03,834 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:17:04,042 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:17:04,458 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-09-30 20:17:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:11,550 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-30 20:17:11,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:17:11,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 134 [2018-09-30 20:17:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:11,552 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:17:11,552 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:17:11,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:17:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:17:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:17:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:17:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:17:11,562 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-09-30 20:17:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:11,563 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:17:11,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:17:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:17:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:17:11,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:11,564 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 20:17:11,564 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:11,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 34 times [2018-09-30 20:17:11,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:11,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:11,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:11,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:11,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:14,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:14,345 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 20:17:14,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:17:14,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:17:14,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:14,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:14,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:14,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 20:17:14,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:17:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:17:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:17:14,539 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 71 states. [2018-09-30 20:17:14,792 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-09-30 20:17:14,982 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-09-30 20:17:15,176 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:17:15,372 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:17:15,572 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:17:15,772 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:17:15,969 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:17:16,167 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:17:16,373 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:17:16,577 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:17:16,789 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:17:16,995 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:17:17,202 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:17:17,402 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:17:17,634 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:17:17,866 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:17:18,093 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:17:18,317 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:17:18,535 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:17:18,760 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:17:18,982 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:17:19,203 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:17:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:26,935 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-30 20:17:26,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:17:26,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 138 [2018-09-30 20:17:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:26,937 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:17:26,937 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:17:26,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:17:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:17:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:17:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:17:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:17:26,945 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-09-30 20:17:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:26,945 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:17:26,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:17:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:17:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:17:26,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:26,946 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 20:17:26,946 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:26,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 35 times [2018-09-30 20:17:26,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:26,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:26,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:30,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:30,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:17:30,405 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:17:30,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 20:17:30,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:30,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:31,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:31,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 20:17:31,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:17:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:17:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:17:31,033 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 73 states. [2018-09-30 20:17:31,234 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-09-30 20:17:31,432 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-09-30 20:17:31,639 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:17:31,846 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:17:32,054 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:17:32,254 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:17:32,462 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:17:32,664 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:17:32,877 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:17:33,131 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:17:33,356 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:17:33,576 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:17:33,796 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:17:34,007 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:17:34,237 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:17:34,468 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:17:34,702 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:17:34,940 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:17:35,173 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:17:35,404 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:17:35,643 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:17:35,873 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:17:36,111 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:17:36,337 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:17:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:44,535 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-30 20:17:44,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:17:44,536 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 142 [2018-09-30 20:17:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:44,537 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:17:44,537 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:17:44,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 20:17:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:17:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:17:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:17:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:17:44,547 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-09-30 20:17:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:44,548 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:17:44,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:17:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:17:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:17:44,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:44,549 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 20:17:44,549 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:44,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 36 times [2018-09-30 20:17:44,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:44,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:44,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:44,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:44,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:47,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:47,592 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 20:17:47,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:17:47,688 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2018-09-30 20:17:47,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:47,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:47,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:47,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 20:17:47,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:17:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:17:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:17:47,846 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 75 states. [2018-09-30 20:17:48,090 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-09-30 20:17:48,302 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-09-30 20:17:48,538 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 20:17:48,768 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 20:17:48,978 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:17:49,191 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:17:49,410 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:17:49,653 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:17:49,882 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:17:50,110 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:17:50,335 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:17:50,565 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:17:50,794 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:17:51,020 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:17:51,265 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:17:51,510 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:17:51,743 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:17:51,983 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:17:52,227 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:17:52,478 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:17:52,722 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:17:52,966 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:17:53,211 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:17:53,459 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:17:53,720 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:17:53,960 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:18:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:02,364 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-30 20:18:02,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:18:02,364 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 146 [2018-09-30 20:18:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:02,366 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:18:02,366 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:18:02,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 20:18:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:18:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:18:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:18:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:18:02,375 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-09-30 20:18:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:02,376 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:18:02,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:18:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:18:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:18:02,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:02,377 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 20:18:02,377 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:02,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 37 times [2018-09-30 20:18:02,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:02,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:02,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:02,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:02,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:06,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:06,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:18:06,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:07,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:07,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:07,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 20:18:07,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:18:07,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:18:07,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:18:07,570 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 77 states. [2018-09-30 20:18:07,797 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-09-30 20:18:08,012 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-09-30 20:18:08,240 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 20:18:08,463 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 20:18:08,681 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 20:18:08,926 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 20:18:09,158 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:18:09,394 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:18:09,628 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:18:09,874 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:18:10,118 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:18:10,363 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:18:10,603 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:18:10,846 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-09-30 20:18:11,103 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-09-30 20:18:11,369 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-09-30 20:18:11,626 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-09-30 20:18:11,903 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-09-30 20:18:12,167 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-09-30 20:18:12,434 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-09-30 20:18:12,705 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-09-30 20:18:12,961 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-09-30 20:18:13,223 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-09-30 20:18:13,491 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-09-30 20:18:13,756 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-09-30 20:18:14,032 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-09-30 20:18:14,313 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-09-30 20:18:14,571 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-09-30 20:18:14,819 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-09-30 20:18:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:23,426 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-30 20:18:23,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:18:23,426 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 150 [2018-09-30 20:18:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:23,428 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:18:23,428 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:18:23,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 20:18:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:18:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:18:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:18:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 20:18:23,440 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-09-30 20:18:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:23,441 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 20:18:23,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:18:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 20:18:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:18:23,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:23,442 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 20:18:23,442 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:23,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:23,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 38 times [2018-09-30 20:18:23,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:23,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:23,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:23,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:23,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:26,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:26,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:18:26,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:27,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:27,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:27,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:28,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:28,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 20:18:28,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:18:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:18:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:18:28,054 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 79 states. [2018-09-30 20:18:28,336 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-09-30 20:18:28,556 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-09-30 20:18:28,797 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-09-30 20:18:29,040 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-09-30 20:18:29,277 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-09-30 20:18:29,538 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-09-30 20:18:29,778 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-09-30 20:18:30,015 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-09-30 20:18:30,271 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-09-30 20:18:30,525 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-09-30 20:18:30,769 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-09-30 20:18:31,027 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-09-30 20:18:31,271 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-09-30 20:18:31,507 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-09-30 20:18:31,767 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-09-30 20:18:32,019 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 Received shutdown request... [2018-09-30 20:18:32,225 WARN L186 SmtUtils]: Removed 22 from assertion stack [2018-09-30 20:18:32,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:18:32,226 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:18:32,230 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:18:32,230 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:18:32 BoogieIcfgContainer [2018-09-30 20:18:32,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:18:32,231 INFO L168 Benchmark]: Toolchain (without parser) took 251231.89 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -148.9 MB). Free memory was 1.4 GB in the beginning and 999.2 MB in the end (delta: 450.2 MB). Peak memory consumption was 301.3 MB. Max. memory is 7.1 GB. [2018-09-30 20:18:32,231 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:18:32,232 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:18:32,232 INFO L168 Benchmark]: Boogie Preprocessor took 26.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:18:32,232 INFO L168 Benchmark]: RCFGBuilder took 312.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 20:18:32,233 INFO L168 Benchmark]: TraceAbstraction took 250842.74 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -148.9 MB). Free memory was 1.4 GB in the beginning and 999.2 MB in the end (delta: 429.1 MB). Peak memory consumption was 280.2 MB. Max. memory is 7.1 GB. [2018-09-30 20:18:32,234 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 312.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 250842.74 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -148.9 MB). Free memory was 1.4 GB in the beginning and 999.2 MB in the end (delta: 429.1 MB). Peak memory consumption was 280.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 38). Cancelled while BasicCegarLoop was constructing difference of abstraction (155states) and FLOYD_HOARE automaton (currently 18 states, 79 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 188. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 250.7s OverallTime, 39 OverallIterations, 76 TraceHistogramMax, 186.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 0 SDslu, 2910 SDs, 0 SdLazy, 3063 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5909 GetRequests, 3003 SyntacticMatches, 0 SemanticMatches, 2905 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33251 ImplicationChecksByTransitivity, 227.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=38, 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: 0.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 9.1s SatisfiabilityAnalysisTime, 52.8s InterpolantComputationTime, 6084 NumberOfCodeBlocks, 6084 NumberOfCodeBlocksAsserted, 780 NumberOfCheckSat, 6007 ConstructedInterpolants, 0 QuantifiedInterpolants, 3090757 SizeOfPredicates, 76 NumberOfNonLiveVariables, 6422 ConjunctsInSsa, 1558 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/149188 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-18-32-242.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-18-32-242.csv Completed graceful shutdown