java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:29:20,635 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:29:20,641 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:29:20,660 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:29:20,660 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:29:20,662 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:29:20,663 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:29:20,666 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:29:20,668 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:29:20,668 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:29:20,669 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:29:20,693 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:29:20,714 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:29:20,715 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:29:20,716 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:29:20,717 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:29:20,717 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:29:20,717 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:29:20,718 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:29:20,718 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:29:20,718 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:29:20,719 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:29:20,720 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:29:20,720 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:29:20,720 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:29:20,720 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:29:20,720 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:29:20,720 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:29:20,721 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:29:20,721 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:29:20,721 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:29:20,721 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:29:20,723 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:29:20,723 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:29:20,723 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:29:20,723 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:29:20,724 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:29:20,724 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:29:20,724 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:29:20,724 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:29:20,724 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:29:20,724 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:29:20,725 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:29:20,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:29:20,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:29:20,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:29:20,811 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:29:20,812 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:29:20,813 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl [2018-09-28 10:29:20,813 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl' [2018-09-28 10:29:20,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:29:20,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:29:20,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:29:20,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:29:20,869 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:29:20,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:29:20,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:29:20,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:29:20,912 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:29:20,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/1) ... [2018-09-28 10:29:20,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:29:20,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:29:20,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:29:20,933 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:29:20,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (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 [2018-09-28 10:29:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:29:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:29:21,273 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:29:21,274 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:29:21 BoogieIcfgContainer [2018-09-28 10:29:21,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:29:21,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:29:21,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:29:21,279 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:29:21,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:29:20" (1/2) ... [2018-09-28 10:29:21,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffe5a19 and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:29:21, skipping insertion in model container [2018-09-28 10:29:21,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:29:21" (2/2) ... [2018-09-28 10:29:21,282 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl [2018-09-28 10:29:21,292 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:29:21,300 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:29:21,349 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:29:21,350 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:29:21,351 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:29:21,351 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:29:21,351 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:29:21,351 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:29:21,351 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:29:21,352 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:29:21,352 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:29:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-28 10:29:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:29:21,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:21,375 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-28 10:29:21,376 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:21,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-09-28 10:29:21,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:21,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:21,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:21,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:21,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:21,531 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:29:21,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:29:21,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:29:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:29:21,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:21,552 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-28 10:29:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:21,796 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-28 10:29:21,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:29:21,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-28 10:29:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:21,810 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:29:21,810 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:29:21,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:29:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:29:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:29:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-28 10:29:21,845 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-09-28 10:29:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:21,845 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-28 10:29:21,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:29:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-28 10:29:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:29:21,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:21,846 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 10:29:21,846 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:21,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:21,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-09-28 10:29:21,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:21,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:21,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:21,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-28 10:29:21,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:21,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:21,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:21,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-28 10:29:22,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:22,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:29:22,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:29:22,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:29:22,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:22,093 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-09-28 10:29:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:22,575 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-28 10:29:22,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:29:22,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-28 10:29:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:22,577 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:29:22,577 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:29:22,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:29:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:29:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:29:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-28 10:29:22,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-28 10:29:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:22,588 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-28 10:29:22,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:29:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-28 10:29:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:29:22,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:22,590 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-28 10:29:22,590 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:22,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:22,591 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times [2018-09-28 10:29:22,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:22,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:22,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-28 10:29:22,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:22,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:22,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:22,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:22,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:22,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-28 10:29:22,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:22,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:29:22,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:29:22,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:29:22,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:22,945 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-09-28 10:29:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:23,142 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-28 10:29:23,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:29:23,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-28 10:29:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:23,144 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:29:23,145 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:29:23,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:29:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:29:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:29:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-28 10:29:23,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-28 10:29:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:23,152 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-28 10:29:23,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:29:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-28 10:29:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:29:23,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:23,154 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-28 10:29:23,154 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:23,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times [2018-09-28 10:29:23,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:23,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:23,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:23,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:23,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-28 10:29:23,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:23,337 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 [2018-09-28 10:29:23,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:23,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:29:23,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:23,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-28 10:29:23,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:23,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:29:23,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:29:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:29:23,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:23,437 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-09-28 10:29:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:23,574 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-09-28 10:29:23,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:29:23,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-28 10:29:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:23,575 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:29:23,575 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:29:23,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:29:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:29:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:29:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-28 10:29:23,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-09-28 10:29:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:23,581 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-28 10:29:23,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:29:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-28 10:29:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:29:23,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:23,583 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-28 10:29:23,583 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:23,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:23,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times [2018-09-28 10:29:23,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:23,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:23,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:23,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:23,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-28 10:29:23,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:23,696 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 [2018-09-28 10:29:23,705 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:23,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:23,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:23,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-28 10:29:24,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:24,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:29:24,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:29:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:29:24,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:24,056 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-09-28 10:29:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:24,349 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-09-28 10:29:24,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:29:24,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-09-28 10:29:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:24,353 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:29:24,353 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:29:24,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:29:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:29:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:29:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-28 10:29:24,360 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-09-28 10:29:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:24,360 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-28 10:29:24,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:29:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-28 10:29:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:29:24,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:24,362 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-28 10:29:24,362 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:24,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times [2018-09-28 10:29:24,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:24,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:24,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:24,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-28 10:29:24,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:24,460 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 [2018-09-28 10:29:24,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:24,492 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:29:24,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:24,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-28 10:29:24,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:24,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:29:24,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:29:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:29:24,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:24,593 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-09-28 10:29:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:24,806 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-28 10:29:24,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:29:24,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-28 10:29:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:24,809 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:29:24,809 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:29:24,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:29:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:29:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:29:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-28 10:29:24,816 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-09-28 10:29:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:24,817 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-28 10:29:24,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:29:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-28 10:29:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:29:24,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:24,818 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-28 10:29:24,819 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:24,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:24,819 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times [2018-09-28 10:29:24,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:24,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:24,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:24,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-28 10:29:24,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:24,928 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 [2018-09-28 10:29:24,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:24,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:29:24,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:24,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-28 10:29:25,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:25,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:29:25,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:29:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:29:25,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:25,103 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-09-28 10:29:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:25,324 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-09-28 10:29:25,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:29:25,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-09-28 10:29:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:25,326 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:29:25,326 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:29:25,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:29:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:29:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:29:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-28 10:29:25,333 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-09-28 10:29:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:25,333 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-28 10:29:25,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:29:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-28 10:29:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:29:25,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:25,335 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-28 10:29:25,335 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:25,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:25,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times [2018-09-28 10:29:25,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:25,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:25,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:25,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:25,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-28 10:29:25,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:25,588 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 [2018-09-28 10:29:25,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:25,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-28 10:29:25,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:25,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:29:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:29:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:29:25,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:25,738 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-09-28 10:29:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:25,910 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2018-09-28 10:29:25,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:29:25,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-09-28 10:29:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:25,912 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:29:25,912 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:29:25,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:29:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:29:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:29:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-28 10:29:25,919 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2018-09-28 10:29:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:25,919 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-28 10:29:25,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:29:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-28 10:29:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:29:25,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:25,920 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-28 10:29:25,921 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:25,921 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times [2018-09-28 10:29:25,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:25,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:25,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:25,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:25,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-28 10:29:26,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:26,027 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 [2018-09-28 10:29:26,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:26,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:26,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:26,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-28 10:29:26,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:26,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:29:26,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:29:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:29:26,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:26,156 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-09-28 10:29:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:26,503 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-09-28 10:29:26,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:29:26,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-09-28 10:29:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:26,510 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:29:26,510 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:29:26,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:29:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:29:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:29:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-28 10:29:26,516 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-09-28 10:29:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:26,516 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-28 10:29:26,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:29:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-28 10:29:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:29:26,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:26,518 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-28 10:29:26,518 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:26,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times [2018-09-28 10:29:26,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:26,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:26,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-28 10:29:26,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:26,639 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 [2018-09-28 10:29:26,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:26,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:29:26,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:26,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-28 10:29:27,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:27,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:29:27,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:29:27,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:29:27,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:27,275 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-09-28 10:29:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:27,613 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-09-28 10:29:27,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:29:27,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-09-28 10:29:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:27,614 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:29:27,614 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:29:27,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:29:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:29:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:29:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-28 10:29:27,621 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2018-09-28 10:29:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:27,622 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-28 10:29:27,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:29:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-28 10:29:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:29:27,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:27,623 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-28 10:29:27,623 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:27,623 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:27,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times [2018-09-28 10:29:27,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:27,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:27,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:27,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:27,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-28 10:29:27,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:27,754 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 [2018-09-28 10:29:27,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:27,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:27,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:27,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-28 10:29:27,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:27,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:29:27,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:29:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:29:27,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:27,887 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2018-09-28 10:29:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:28,111 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-28 10:29:28,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:29:28,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-09-28 10:29:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:28,112 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:29:28,113 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:29:28,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:29:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:29:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:29:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-28 10:29:28,120 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-09-28 10:29:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:28,120 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-28 10:29:28,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:29:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-28 10:29:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:29:28,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:28,121 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-28 10:29:28,122 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:28,122 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times [2018-09-28 10:29:28,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:28,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:28,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:28,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:28,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-09-28 10:29:28,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:28,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:28,301 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:28,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:29:28,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:28,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-09-28 10:29:28,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:28,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:29:28,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:29:28,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:29:28,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:28,468 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-09-28 10:29:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:28,953 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-09-28 10:29:28,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:29:28,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-09-28 10:29:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:28,954 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:29:28,955 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:29:28,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:29:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:29:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:29:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-28 10:29:28,963 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-09-28 10:29:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:28,963 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-28 10:29:28,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:29:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-28 10:29:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:29:28,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:28,964 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-28 10:29:28,965 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:28,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:28,965 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times [2018-09-28 10:29:28,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:28,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:28,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:28,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:28,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-28 10:29:29,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:29,144 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 [2018-09-28 10:29:29,151 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:29,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:29:29,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:29,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-28 10:29:29,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:29,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:29:29,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:29:29,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:29:29,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:29,472 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2018-09-28 10:29:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:29,721 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2018-09-28 10:29:29,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:29:29,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-09-28 10:29:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:29,722 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:29:29,722 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:29:29,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:29:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:29:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:29:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-28 10:29:29,728 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-09-28 10:29:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:29,728 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-28 10:29:29,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:29:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-28 10:29:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:29:29,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:29,729 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-28 10:29:29,730 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:29,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:29,730 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times [2018-09-28 10:29:29,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:29,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:29,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:29,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:29,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-09-28 10:29:29,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:29,901 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 [2018-09-28 10:29:29,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:29,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-09-28 10:29:30,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:30,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:29:30,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:29:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:29:30,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:30,131 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2018-09-28 10:29:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:30,481 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2018-09-28 10:29:30,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:29:30,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-28 10:29:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:30,482 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:29:30,482 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:29:30,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:29:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:29:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:29:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-28 10:29:30,490 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-09-28 10:29:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:30,490 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-28 10:29:30,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:29:30,491 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-28 10:29:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:29:30,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:30,492 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-28 10:29:30,492 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:30,492 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times [2018-09-28 10:29:30,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:30,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:30,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:30,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:30,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-28 10:29:30,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:30,747 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 [2018-09-28 10:29:30,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:30,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:30,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:30,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-28 10:29:30,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:30,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:29:30,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:29:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:29:30,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:30,946 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states. [2018-09-28 10:29:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:31,210 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-09-28 10:29:31,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:29:31,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-09-28 10:29:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:31,212 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:29:31,212 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:29:31,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:29:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:29:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:29:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-28 10:29:31,218 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-09-28 10:29:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:31,219 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-28 10:29:31,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:29:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-28 10:29:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:29:31,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:31,220 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-28 10:29:31,220 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:31,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times [2018-09-28 10:29:31,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:31,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:31,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:31,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:31,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-28 10:29:31,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:31,462 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 [2018-09-28 10:29:31,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:31,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:29:31,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:31,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-28 10:29:31,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:31,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:29:31,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:29:31,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:29:31,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:31,637 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2018-09-28 10:29:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:32,157 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-28 10:29:32,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:29:32,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-09-28 10:29:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:32,158 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:29:32,158 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:29:32,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:29:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:29:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:29:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-28 10:29:32,164 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-09-28 10:29:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:32,165 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-28 10:29:32,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:29:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-28 10:29:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:29:32,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:32,166 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-28 10:29:32,166 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:32,166 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times [2018-09-28 10:29:32,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:32,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:32,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:32,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:32,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-09-28 10:29:33,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:33,089 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 [2018-09-28 10:29:33,096 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:33,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:33,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:33,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-09-28 10:29:33,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:33,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:29:33,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:29:33,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:29:33,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:33,260 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states. [2018-09-28 10:29:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:33,560 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2018-09-28 10:29:33,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:29:33,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-09-28 10:29:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:33,562 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:29:33,562 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:29:33,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:29:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:29:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:29:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-28 10:29:33,566 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2018-09-28 10:29:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:33,566 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-28 10:29:33,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:29:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-28 10:29:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:29:33,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:33,567 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-28 10:29:33,567 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:33,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times [2018-09-28 10:29:33,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:33,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:33,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:33,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:33,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-09-28 10:29:33,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:33,759 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 [2018-09-28 10:29:33,766 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:33,848 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:29:33,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:33,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-09-28 10:29:34,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:34,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:29:34,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:29:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:29:34,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:34,227 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-09-28 10:29:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:34,853 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2018-09-28 10:29:34,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:29:34,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-09-28 10:29:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:34,854 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:29:34,855 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:29:34,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:29:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:29:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:29:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-28 10:29:34,860 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-09-28 10:29:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:34,860 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-28 10:29:34,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:29:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-28 10:29:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:29:34,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:34,862 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-28 10:29:34,862 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:34,862 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times [2018-09-28 10:29:34,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:34,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:34,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:34,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:34,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-09-28 10:29:35,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:35,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:35,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:35,292 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:29:35,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:35,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-09-28 10:29:35,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:35,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:29:35,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:29:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:29:35,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:35,433 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2018-09-28 10:29:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:35,688 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2018-09-28 10:29:35,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:29:35,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-09-28 10:29:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:35,690 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:29:35,690 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:29:35,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:29:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:29:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:29:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-28 10:29:35,695 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2018-09-28 10:29:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:35,695 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-28 10:29:35,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:29:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-28 10:29:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:29:35,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:35,696 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-28 10:29:35,697 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:35,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times [2018-09-28 10:29:35,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:35,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:35,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:35,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:35,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-09-28 10:29:35,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:35,919 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 [2018-09-28 10:29:35,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:35,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-09-28 10:29:36,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:36,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:29:36,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:29:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:29:36,110 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:36,110 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states. [2018-09-28 10:29:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:36,410 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2018-09-28 10:29:36,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:29:36,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-09-28 10:29:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:36,411 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:29:36,411 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:29:36,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:29:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:29:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:29:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-28 10:29:36,416 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2018-09-28 10:29:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:36,417 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-28 10:29:36,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:29:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-28 10:29:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:29:36,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:36,418 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-28 10:29:36,418 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:36,418 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times [2018-09-28 10:29:36,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:36,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:36,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:36,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-09-28 10:29:36,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:36,724 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 [2018-09-28 10:29:36,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:36,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:36,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:36,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-09-28 10:29:36,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:36,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:29:36,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:29:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:29:36,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:36,861 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states. [2018-09-28 10:29:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:37,174 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-28 10:29:37,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:29:37,175 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-09-28 10:29:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:37,176 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:29:37,176 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:29:37,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:29:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:29:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:29:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-28 10:29:37,180 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-09-28 10:29:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:37,180 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-28 10:29:37,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:29:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-28 10:29:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:29:37,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:37,181 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-28 10:29:37,181 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:37,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times [2018-09-28 10:29:37,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:37,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:37,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:37,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:37,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-28 10:29:37,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:37,587 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 [2018-09-28 10:29:37,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:37,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-28 10:29:37,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:37,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-28 10:29:37,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:37,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:29:37,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:29:37,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:29:37,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:37,913 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2018-09-28 10:29:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:38,307 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2018-09-28 10:29:38,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:29:38,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-09-28 10:29:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:38,311 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:29:38,311 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:29:38,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:29:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:29:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:29:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-28 10:29:38,315 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2018-09-28 10:29:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:38,315 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-28 10:29:38,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:29:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-28 10:29:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:29:38,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:38,316 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-28 10:29:38,317 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:38,317 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times [2018-09-28 10:29:38,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:38,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:38,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:38,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:38,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-09-28 10:29:39,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:39,033 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 [2018-09-28 10:29:39,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:39,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:39,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:39,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-09-28 10:29:39,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:39,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:29:39,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:29:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:29:39,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:39,239 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states. [2018-09-28 10:29:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:39,816 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2018-09-28 10:29:39,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:29:39,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-09-28 10:29:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:39,818 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:29:39,818 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:29:39,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:29:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:29:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:29:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-28 10:29:39,823 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2018-09-28 10:29:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:39,823 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-28 10:29:39,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:29:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-28 10:29:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:29:39,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:39,825 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-28 10:29:39,825 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:39,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times [2018-09-28 10:29:39,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:39,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:39,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:39,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:39,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-28 10:29:40,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:40,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:40,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:40,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-28 10:29:40,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:40,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-28 10:29:40,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:40,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:29:40,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:29:40,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:29:40,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:40,304 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states. [2018-09-28 10:29:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:41,020 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2018-09-28 10:29:41,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:29:41,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-09-28 10:29:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:41,022 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:29:41,022 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:29:41,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:29:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:29:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:29:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-28 10:29:41,026 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-09-28 10:29:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:41,027 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-28 10:29:41,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:29:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-28 10:29:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:29:41,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:41,028 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-28 10:29:41,028 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:41,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times [2018-09-28 10:29:41,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:41,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:41,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:41,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:41,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-28 10:29:41,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:41,223 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 [2018-09-28 10:29:41,230 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:41,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:29:41,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:41,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-28 10:29:41,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:41,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:29:41,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:29:41,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:29:41,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:41,523 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2018-09-28 10:29:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:41,865 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2018-09-28 10:29:41,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:29:41,865 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-09-28 10:29:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:41,866 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:29:41,866 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:29:41,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:29:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:29:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:29:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-28 10:29:41,870 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2018-09-28 10:29:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:41,871 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-28 10:29:41,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:29:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-28 10:29:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:29:41,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:41,871 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-28 10:29:41,872 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:41,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times [2018-09-28 10:29:41,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:41,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:41,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-09-28 10:29:42,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:42,154 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 [2018-09-28 10:29:42,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:42,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-09-28 10:29:42,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:42,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:29:42,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:29:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:29:42,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:42,328 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states. [2018-09-28 10:29:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:42,876 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-28 10:29:42,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:29:42,877 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-09-28 10:29:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:42,877 INFO L225 Difference]: With dead ends: 165 [2018-09-28 10:29:42,877 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:29:42,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:29:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:29:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:29:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-28 10:29:42,882 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2018-09-28 10:29:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:42,883 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-28 10:29:42,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:29:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-28 10:29:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:29:42,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:42,883 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-28 10:29:42,884 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:42,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times [2018-09-28 10:29:42,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:42,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:42,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:42,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-09-28 10:29:43,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:43,205 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 [2018-09-28 10:29:43,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:43,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:43,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:43,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-09-28 10:29:43,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:43,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:29:43,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:29:43,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:29:43,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:43,380 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states. [2018-09-28 10:29:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:43,821 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-09-28 10:29:43,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:29:43,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-09-28 10:29:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:43,823 INFO L225 Difference]: With dead ends: 171 [2018-09-28 10:29:43,823 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:29:43,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:29:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:29:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:29:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-28 10:29:43,827 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-09-28 10:29:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:43,827 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-28 10:29:43,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:29:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-28 10:29:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:29:43,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:43,829 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-28 10:29:43,829 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:43,829 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:43,829 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times [2018-09-28 10:29:43,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:43,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:43,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:43,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:43,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-09-28 10:29:44,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:44,419 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 [2018-09-28 10:29:44,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:44,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-28 10:29:44,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:44,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-09-28 10:29:44,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:44,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:29:44,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:29:44,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:29:44,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:44,802 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2018-09-28 10:29:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:45,170 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2018-09-28 10:29:45,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:29:45,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-09-28 10:29:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:45,172 INFO L225 Difference]: With dead ends: 177 [2018-09-28 10:29:45,172 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:29:45,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:29:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:29:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:29:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-28 10:29:45,176 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2018-09-28 10:29:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:45,177 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-28 10:29:45,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:29:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-28 10:29:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:29:45,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:45,178 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-28 10:29:45,178 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:45,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times [2018-09-28 10:29:45,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:45,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:45,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:45,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:45,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-28 10:29:46,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:46,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:46,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:46,100 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:46,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:46,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-28 10:29:47,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:47,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:29:47,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:29:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:29:47,081 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:47,081 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states. [2018-09-28 10:29:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:47,481 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2018-09-28 10:29:47,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:29:47,481 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-09-28 10:29:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:47,482 INFO L225 Difference]: With dead ends: 183 [2018-09-28 10:29:47,482 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:29:47,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:29:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:29:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:29:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-28 10:29:47,487 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2018-09-28 10:29:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:47,487 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-28 10:29:47,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:29:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-28 10:29:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:29:47,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:47,487 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-28 10:29:47,488 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:47,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:47,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times [2018-09-28 10:29:47,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:47,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:47,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:47,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-09-28 10:29:47,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:47,681 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 [2018-09-28 10:29:47,688 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:47,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-28 10:29:47,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:47,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-09-28 10:29:48,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:48,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:29:48,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:29:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:29:48,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:48,192 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states. [2018-09-28 10:29:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:48,674 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2018-09-28 10:29:48,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:29:48,674 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-09-28 10:29:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:48,675 INFO L225 Difference]: With dead ends: 189 [2018-09-28 10:29:48,675 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:29:48,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:29:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:29:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:29:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-28 10:29:48,680 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-09-28 10:29:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:48,680 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-28 10:29:48,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:29:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-28 10:29:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:29:48,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:48,681 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-28 10:29:48,681 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:48,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times [2018-09-28 10:29:48,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:48,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:48,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:48,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:48,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-09-28 10:29:48,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:48,916 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 [2018-09-28 10:29:48,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:49,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:29:49,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:49,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-09-28 10:29:49,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:49,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:29:49,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:29:49,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:29:49,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:49,243 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2018-09-28 10:29:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:49,689 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-28 10:29:49,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:29:49,690 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-09-28 10:29:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:49,691 INFO L225 Difference]: With dead ends: 195 [2018-09-28 10:29:49,691 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:29:49,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:29:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:29:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:29:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-28 10:29:49,697 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2018-09-28 10:29:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:49,697 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-28 10:29:49,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:29:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-28 10:29:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:29:49,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:49,699 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-28 10:29:49,699 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:49,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times [2018-09-28 10:29:49,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:49,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:49,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:49,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:49,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-28 10:29:50,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:50,038 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 [2018-09-28 10:29:50,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:50,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-28 10:29:50,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:50,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:29:50,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:29:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:29:50,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:50,314 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states. [2018-09-28 10:29:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:51,734 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-09-28 10:29:51,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:29:51,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-09-28 10:29:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:51,736 INFO L225 Difference]: With dead ends: 201 [2018-09-28 10:29:51,736 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:29:51,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:29:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:29:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:29:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-28 10:29:51,741 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-09-28 10:29:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:51,741 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-28 10:29:51,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:29:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-28 10:29:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:29:51,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:51,743 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-28 10:29:51,743 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:51,743 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:51,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times [2018-09-28 10:29:51,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:51,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:51,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:51,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:51,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-09-28 10:29:52,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:52,267 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 [2018-09-28 10:29:52,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:52,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:52,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:52,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-09-28 10:29:52,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:52,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:29:52,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:29:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:29:52,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:52,478 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states. [2018-09-28 10:29:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:52,937 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-09-28 10:29:52,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:29:52,938 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-09-28 10:29:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:52,939 INFO L225 Difference]: With dead ends: 207 [2018-09-28 10:29:52,939 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:29:52,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:29:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:29:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:29:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-28 10:29:52,944 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-09-28 10:29:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:52,944 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-28 10:29:52,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:29:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-28 10:29:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:29:52,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:52,946 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-28 10:29:52,946 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:52,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:52,946 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times [2018-09-28 10:29:52,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:52,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:52,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:52,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:52,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-09-28 10:29:54,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:54,511 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 [2018-09-28 10:29:54,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:54,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:29:54,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:54,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-09-28 10:29:54,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:54,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:29:54,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:29:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:29:54,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:54,994 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2018-09-28 10:29:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:55,485 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2018-09-28 10:29:55,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:29:55,486 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-09-28 10:29:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:55,487 INFO L225 Difference]: With dead ends: 213 [2018-09-28 10:29:55,487 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:29:55,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:29:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:29:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:29:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-28 10:29:55,491 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2018-09-28 10:29:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:55,491 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-28 10:29:55,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:29:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-28 10:29:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:29:55,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:55,492 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-28 10:29:55,492 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:55,492 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times [2018-09-28 10:29:55,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:55,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:55,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-09-28 10:29:55,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:55,775 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 [2018-09-28 10:29:55,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:55,842 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:55,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:55,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-09-28 10:29:56,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:56,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:29:56,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:29:56,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:29:56,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:56,002 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states. [2018-09-28 10:29:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:56,568 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-09-28 10:29:56,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:29:56,569 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-09-28 10:29:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:56,570 INFO L225 Difference]: With dead ends: 219 [2018-09-28 10:29:56,570 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:29:56,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:29:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:29:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:29:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-28 10:29:56,575 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2018-09-28 10:29:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:56,575 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-28 10:29:56,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:29:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-28 10:29:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:29:56,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:56,577 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-28 10:29:56,577 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:56,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times [2018-09-28 10:29:56,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:56,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:56,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:56,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:56,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-09-28 10:29:56,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:56,899 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 [2018-09-28 10:29:56,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:57,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-28 10:29:57,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:57,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-09-28 10:29:57,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:57,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:29:57,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:29:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:29:57,690 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:57,690 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states. [2018-09-28 10:29:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:58,734 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-28 10:29:58,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:29:58,735 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-09-28 10:29:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:58,736 INFO L225 Difference]: With dead ends: 225 [2018-09-28 10:29:58,736 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:29:58,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:29:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:29:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:29:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-28 10:29:58,740 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-09-28 10:29:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:58,740 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-28 10:29:58,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:29:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-28 10:29:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:29:58,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:58,741 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-28 10:29:58,742 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:58,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times [2018-09-28 10:29:58,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:58,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:58,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:58,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:58,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-09-28 10:29:59,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:59,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:29:59,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:59,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:29:59,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:59,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-09-28 10:29:59,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:59,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:29:59,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:29:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:29:59,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:59,954 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2018-09-28 10:30:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:00,599 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2018-09-28 10:30:00,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:30:00,599 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-09-28 10:30:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:00,600 INFO L225 Difference]: With dead ends: 231 [2018-09-28 10:30:00,600 INFO L226 Difference]: Without dead ends: 155 [2018-09-28 10:30:00,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-28 10:30:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-28 10:30:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-28 10:30:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-28 10:30:00,606 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2018-09-28 10:30:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:00,606 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-28 10:30:00,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:30:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-28 10:30:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-28 10:30:00,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:00,607 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-28 10:30:00,607 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:00,607 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times [2018-09-28 10:30:00,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:00,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:00,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:00,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:00,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-09-28 10:30:01,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:01,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:30:01,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:01,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-09-28 10:30:01,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:01,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:30:01,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:30:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:30:01,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:01,837 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-09-28 10:30:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:02,408 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2018-09-28 10:30:02,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:30:02,409 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-09-28 10:30:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:02,410 INFO L225 Difference]: With dead ends: 237 [2018-09-28 10:30:02,410 INFO L226 Difference]: Without dead ends: 159 [2018-09-28 10:30:02,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-28 10:30:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-28 10:30:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-28 10:30:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-28 10:30:02,414 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2018-09-28 10:30:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:02,414 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-28 10:30:02,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:30:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-28 10:30:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-28 10:30:02,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:02,415 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-28 10:30:02,415 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:02,415 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times [2018-09-28 10:30:02,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:02,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:02,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:02,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:02,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-09-28 10:30:02,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:02,864 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 [2018-09-28 10:30:02,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:02,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:02,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:02,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-09-28 10:30:04,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:04,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:30:04,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:30:04,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:30:04,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:04,547 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states. [2018-09-28 10:30:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:05,250 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2018-09-28 10:30:05,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:30:05,251 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-09-28 10:30:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:05,252 INFO L225 Difference]: With dead ends: 243 [2018-09-28 10:30:05,252 INFO L226 Difference]: Without dead ends: 163 [2018-09-28 10:30:05,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-28 10:30:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-28 10:30:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-28 10:30:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-28 10:30:05,256 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-09-28 10:30:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:05,257 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-28 10:30:05,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:30:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-28 10:30:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-28 10:30:05,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:05,258 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-28 10:30:05,258 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:05,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:05,258 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times [2018-09-28 10:30:05,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:05,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:05,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-09-28 10:30:05,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:05,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:05,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:06,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-28 10:30:06,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:06,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-09-28 10:30:06,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:06,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:30:06,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:30:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:30:06,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:06,757 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states. [2018-09-28 10:30:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:07,386 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2018-09-28 10:30:07,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:30:07,387 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-09-28 10:30:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:07,388 INFO L225 Difference]: With dead ends: 249 [2018-09-28 10:30:07,388 INFO L226 Difference]: Without dead ends: 167 [2018-09-28 10:30:07,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-28 10:30:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-28 10:30:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-28 10:30:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-28 10:30:07,393 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2018-09-28 10:30:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:07,394 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-28 10:30:07,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:30:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-28 10:30:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-28 10:30:07,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:07,395 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-28 10:30:07,395 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:07,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times [2018-09-28 10:30:07,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:07,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:07,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:07,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:07,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-09-28 10:30:07,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:07,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:07,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:07,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:07,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:07,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-09-28 10:30:07,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:07,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:30:07,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:30:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:30:07,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:07,996 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states. [2018-09-28 10:30:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:09,031 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-28 10:30:09,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:30:09,032 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-09-28 10:30:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:09,033 INFO L225 Difference]: With dead ends: 255 [2018-09-28 10:30:09,033 INFO L226 Difference]: Without dead ends: 171 [2018-09-28 10:30:09,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-28 10:30:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-28 10:30:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-28 10:30:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-28 10:30:09,038 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2018-09-28 10:30:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:09,038 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-28 10:30:09,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:30:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-28 10:30:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-28 10:30:09,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:09,040 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-28 10:30:09,040 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:09,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times [2018-09-28 10:30:09,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:09,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:09,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:09,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:09,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-28 10:30:09,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:09,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:09,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:10,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-28 10:30:10,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:10,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-28 10:30:10,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:10,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:30:10,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:30:10,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:30:10,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:10,856 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states. [2018-09-28 10:30:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:11,538 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2018-09-28 10:30:11,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:30:11,539 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-09-28 10:30:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:11,540 INFO L225 Difference]: With dead ends: 261 [2018-09-28 10:30:11,540 INFO L226 Difference]: Without dead ends: 175 [2018-09-28 10:30:11,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-28 10:30:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-28 10:30:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-28 10:30:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-28 10:30:11,545 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2018-09-28 10:30:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:11,545 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-28 10:30:11,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:30:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-28 10:30:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-28 10:30:11,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:11,546 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-28 10:30:11,546 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:11,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times [2018-09-28 10:30:11,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:11,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:11,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:11,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-09-28 10:30:11,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:11,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:11,936 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:12,393 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:30:12,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:12,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-09-28 10:30:12,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:12,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:30:12,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:30:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:30:12,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:12,602 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states. [2018-09-28 10:30:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:13,258 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2018-09-28 10:30:13,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:30:13,258 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-09-28 10:30:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:13,260 INFO L225 Difference]: With dead ends: 267 [2018-09-28 10:30:13,260 INFO L226 Difference]: Without dead ends: 179 [2018-09-28 10:30:13,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-28 10:30:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-28 10:30:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-28 10:30:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-28 10:30:13,263 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2018-09-28 10:30:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:13,264 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-28 10:30:13,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:30:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-28 10:30:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-28 10:30:13,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:13,265 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-28 10:30:13,265 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:13,265 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times [2018-09-28 10:30:13,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:13,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:13,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:13,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:13,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-09-28 10:30:13,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:13,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:13,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:13,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-09-28 10:30:14,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:14,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:30:14,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:30:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:30:14,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:14,253 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states. [2018-09-28 10:30:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:14,925 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2018-09-28 10:30:14,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:30:14,925 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-09-28 10:30:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:14,926 INFO L225 Difference]: With dead ends: 273 [2018-09-28 10:30:14,927 INFO L226 Difference]: Without dead ends: 183 [2018-09-28 10:30:14,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-28 10:30:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-28 10:30:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-28 10:30:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-28 10:30:14,931 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2018-09-28 10:30:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:14,932 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-28 10:30:14,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:30:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-28 10:30:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-28 10:30:14,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:14,933 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-28 10:30:14,933 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:14,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times [2018-09-28 10:30:14,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:14,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:14,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:14,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:14,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-28 10:30:16,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:16,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:17,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:17,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:17,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:17,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-28 10:30:17,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:17,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:30:17,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:30:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:30:17,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:17,282 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states. [2018-09-28 10:30:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:17,990 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2018-09-28 10:30:17,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:30:17,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-09-28 10:30:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:17,991 INFO L225 Difference]: With dead ends: 279 [2018-09-28 10:30:17,992 INFO L226 Difference]: Without dead ends: 187 [2018-09-28 10:30:17,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-28 10:30:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-28 10:30:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-28 10:30:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-28 10:30:17,996 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2018-09-28 10:30:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:17,996 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-28 10:30:17,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:30:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-28 10:30:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-28 10:30:17,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:17,997 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-28 10:30:17,997 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:17,997 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times [2018-09-28 10:30:17,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:17,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:17,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:17,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:17,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-09-28 10:30:18,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:18,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:18,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:19,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-28 10:30:19,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:19,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-09-28 10:30:20,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:20,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:30:20,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:30:20,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:30:20,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:20,268 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states. [2018-09-28 10:30:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:21,023 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-09-28 10:30:21,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:30:21,024 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-09-28 10:30:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:21,026 INFO L225 Difference]: With dead ends: 285 [2018-09-28 10:30:21,026 INFO L226 Difference]: Without dead ends: 191 [2018-09-28 10:30:21,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-28 10:30:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-28 10:30:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-28 10:30:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-28 10:30:21,031 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2018-09-28 10:30:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:21,031 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-28 10:30:21,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:30:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-28 10:30:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-28 10:30:21,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:21,033 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-28 10:30:21,033 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:21,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:21,033 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times [2018-09-28 10:30:21,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:21,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:21,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:21,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:21,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-09-28 10:30:21,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:21,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:21,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:21,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:21,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:21,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-09-28 10:30:21,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:21,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:30:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:30:21,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:30:21,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:21,828 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states. [2018-09-28 10:30:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:22,607 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2018-09-28 10:30:22,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:30:22,607 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-09-28 10:30:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:22,609 INFO L225 Difference]: With dead ends: 291 [2018-09-28 10:30:22,609 INFO L226 Difference]: Without dead ends: 195 [2018-09-28 10:30:22,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-28 10:30:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-28 10:30:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-28 10:30:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-28 10:30:22,614 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2018-09-28 10:30:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:22,614 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-28 10:30:22,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:30:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-28 10:30:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-28 10:30:22,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:22,616 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-28 10:30:22,616 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:22,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times [2018-09-28 10:30:22,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:22,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:22,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:22,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:22,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-09-28 10:30:22,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:22,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:22,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:23,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-28 10:30:23,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:23,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-09-28 10:30:24,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:24,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:30:24,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:30:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:30:24,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:24,375 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states. [2018-09-28 10:30:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:25,199 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2018-09-28 10:30:25,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:30:25,200 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-09-28 10:30:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:25,201 INFO L225 Difference]: With dead ends: 297 [2018-09-28 10:30:25,201 INFO L226 Difference]: Without dead ends: 199 [2018-09-28 10:30:25,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-28 10:30:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-28 10:30:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-28 10:30:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-28 10:30:25,205 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2018-09-28 10:30:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:25,205 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-28 10:30:25,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:30:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-28 10:30:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-28 10:30:25,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:25,206 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-28 10:30:25,206 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:25,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times [2018-09-28 10:30:25,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:25,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:25,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:25,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:25,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-09-28 10:30:25,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:25,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:25,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:26,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:30:26,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:26,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-09-28 10:30:26,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:26,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:30:26,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:30:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:30:26,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:26,560 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states. [2018-09-28 10:30:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:27,446 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2018-09-28 10:30:27,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:30:27,446 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-09-28 10:30:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:27,447 INFO L225 Difference]: With dead ends: 303 [2018-09-28 10:30:27,447 INFO L226 Difference]: Without dead ends: 203 [2018-09-28 10:30:27,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-28 10:30:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-28 10:30:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-28 10:30:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-28 10:30:27,454 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-09-28 10:30:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:27,454 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-28 10:30:27,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:30:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-28 10:30:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-28 10:30:27,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:27,455 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-28 10:30:27,455 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:27,455 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times [2018-09-28 10:30:27,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:27,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:27,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:27,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:27,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-09-28 10:30:28,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:28,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:28,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:28,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-09-28 10:30:28,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:28,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:30:28,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:30:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:30:28,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:28,387 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states. [2018-09-28 10:30:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:29,334 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2018-09-28 10:30:29,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:30:29,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-09-28 10:30:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:29,336 INFO L225 Difference]: With dead ends: 309 [2018-09-28 10:30:29,336 INFO L226 Difference]: Without dead ends: 207 [2018-09-28 10:30:29,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-28 10:30:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-28 10:30:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-28 10:30:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-28 10:30:29,341 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-09-28 10:30:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:29,342 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-28 10:30:29,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:30:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-28 10:30:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-28 10:30:29,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:29,343 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-28 10:30:29,343 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:29,344 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:29,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times [2018-09-28 10:30:29,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:29,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:29,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:29,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:29,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-09-28 10:30:29,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:29,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:29,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:29,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:29,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:29,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-09-28 10:30:30,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:30,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:30:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:30:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:30:30,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:30,047 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states. [2018-09-28 10:30:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:31,473 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-09-28 10:30:31,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:30:31,474 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-09-28 10:30:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:31,475 INFO L225 Difference]: With dead ends: 315 [2018-09-28 10:30:31,475 INFO L226 Difference]: Without dead ends: 211 [2018-09-28 10:30:31,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-28 10:30:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-28 10:30:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-28 10:30:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-09-28 10:30:31,481 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2018-09-28 10:30:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:31,481 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-09-28 10:30:31,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:30:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-09-28 10:30:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-28 10:30:31,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:31,482 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-09-28 10:30:31,483 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:31,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times [2018-09-28 10:30:31,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:31,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:31,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-09-28 10:30:31,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:31,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:31,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:33,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-28 10:30:33,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:33,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-09-28 10:30:34,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:34,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:30:34,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:30:34,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:30:34,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:34,197 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states. [2018-09-28 10:30:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:35,209 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-09-28 10:30:35,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:30:35,209 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-09-28 10:30:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:35,210 INFO L225 Difference]: With dead ends: 321 [2018-09-28 10:30:35,210 INFO L226 Difference]: Without dead ends: 215 [2018-09-28 10:30:35,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-28 10:30:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-28 10:30:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-28 10:30:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-09-28 10:30:35,215 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2018-09-28 10:30:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:35,215 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-09-28 10:30:35,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:30:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-09-28 10:30:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-28 10:30:35,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:35,217 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-09-28 10:30:35,217 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:35,217 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times [2018-09-28 10:30:35,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:35,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:35,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:35,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:35,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-09-28 10:30:35,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:35,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:35,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:35,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:35,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:35,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-09-28 10:30:35,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:35,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:30:35,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:30:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:30:35,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:35,934 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states. [2018-09-28 10:30:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:36,947 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2018-09-28 10:30:36,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:30:36,947 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-09-28 10:30:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:36,948 INFO L225 Difference]: With dead ends: 327 [2018-09-28 10:30:36,948 INFO L226 Difference]: Without dead ends: 219 [2018-09-28 10:30:36,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-28 10:30:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-28 10:30:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-28 10:30:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-09-28 10:30:36,952 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2018-09-28 10:30:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:36,952 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-09-28 10:30:36,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:30:36,952 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-09-28 10:30:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-28 10:30:36,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:36,953 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-09-28 10:30:36,953 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:36,953 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times [2018-09-28 10:30:36,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:36,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:36,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:36,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:36,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-09-28 10:30:37,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:37,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:37,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:39,462 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-28 10:30:39,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:39,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-09-28 10:30:39,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:39,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:30:39,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:30:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:30:39,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:39,782 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states. [2018-09-28 10:30:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:40,802 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2018-09-28 10:30:40,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:30:40,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-09-28 10:30:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:40,804 INFO L225 Difference]: With dead ends: 333 [2018-09-28 10:30:40,804 INFO L226 Difference]: Without dead ends: 223 [2018-09-28 10:30:40,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-28 10:30:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-28 10:30:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-28 10:30:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-09-28 10:30:40,809 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2018-09-28 10:30:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:40,809 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-09-28 10:30:40,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:30:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-09-28 10:30:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-28 10:30:40,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:40,810 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-09-28 10:30:40,810 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:40,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:40,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times [2018-09-28 10:30:40,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:40,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:40,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:40,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:40,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-28 10:30:41,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:41,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:41,165 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:42,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:30:42,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:42,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-28 10:30:42,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:42,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:30:42,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:30:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:30:42,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:42,325 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states. [2018-09-28 10:30:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:43,366 INFO L93 Difference]: Finished difference Result 339 states and 342 transitions. [2018-09-28 10:30:43,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:30:43,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-09-28 10:30:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:43,368 INFO L225 Difference]: With dead ends: 339 [2018-09-28 10:30:43,368 INFO L226 Difference]: Without dead ends: 227 [2018-09-28 10:30:43,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-28 10:30:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-28 10:30:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-28 10:30:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-09-28 10:30:43,377 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2018-09-28 10:30:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:43,377 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-09-28 10:30:43,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:30:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-09-28 10:30:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-28 10:30:43,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:43,379 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-09-28 10:30:43,379 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:43,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times [2018-09-28 10:30:43,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:43,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:43,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:43,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:43,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-28 10:30:43,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:43,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:43,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:43,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-28 10:30:44,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:44,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:30:44,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:30:44,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:30:44,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:44,230 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states. [2018-09-28 10:30:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:45,435 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-09-28 10:30:45,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:30:45,435 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-09-28 10:30:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:45,436 INFO L225 Difference]: With dead ends: 345 [2018-09-28 10:30:45,436 INFO L226 Difference]: Without dead ends: 231 [2018-09-28 10:30:45,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-28 10:30:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-28 10:30:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-28 10:30:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-09-28 10:30:45,441 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2018-09-28 10:30:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:45,442 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-09-28 10:30:45,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:30:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-09-28 10:30:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-28 10:30:45,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:45,443 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-09-28 10:30:45,443 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:45,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:45,444 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times [2018-09-28 10:30:45,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:45,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:45,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:45,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:45,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-09-28 10:30:45,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:45,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:45,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:45,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:45,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:45,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-09-28 10:30:46,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:46,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:30:46,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:30:46,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:30:46,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:46,362 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states. [2018-09-28 10:30:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:47,501 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2018-09-28 10:30:47,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:30:47,501 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-09-28 10:30:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:47,502 INFO L225 Difference]: With dead ends: 351 [2018-09-28 10:30:47,502 INFO L226 Difference]: Without dead ends: 235 [2018-09-28 10:30:47,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-28 10:30:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-28 10:30:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-28 10:30:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-09-28 10:30:47,506 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2018-09-28 10:30:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:47,506 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-09-28 10:30:47,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:30:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-09-28 10:30:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-28 10:30:47,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:47,507 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-09-28 10:30:47,507 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:47,508 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times [2018-09-28 10:30:47,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:47,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:47,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:47,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-09-28 10:30:47,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:47,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:47,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:49,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-28 10:30:49,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:49,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-09-28 10:30:50,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:50,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:30:50,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:30:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:30:50,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:50,016 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states. [2018-09-28 10:30:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:51,146 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2018-09-28 10:30:51,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:30:51,147 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-09-28 10:30:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:51,148 INFO L225 Difference]: With dead ends: 357 [2018-09-28 10:30:51,148 INFO L226 Difference]: Without dead ends: 239 [2018-09-28 10:30:51,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-28 10:30:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-28 10:30:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-28 10:30:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-09-28 10:30:51,152 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2018-09-28 10:30:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:51,152 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-09-28 10:30:51,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:30:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-09-28 10:30:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-28 10:30:51,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:51,153 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-09-28 10:30:51,153 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:51,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times [2018-09-28 10:30:51,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:51,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:51,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:51,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:51,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-09-28 10:30:51,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:51,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:51,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:51,733 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:51,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:51,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-09-28 10:30:51,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:51,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:30:51,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:30:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:30:51,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:51,979 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states. [2018-09-28 10:30:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:53,198 INFO L93 Difference]: Finished difference Result 363 states and 366 transitions. [2018-09-28 10:30:53,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:30:53,199 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-09-28 10:30:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:53,200 INFO L225 Difference]: With dead ends: 363 [2018-09-28 10:30:53,200 INFO L226 Difference]: Without dead ends: 243 [2018-09-28 10:30:53,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-28 10:30:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-28 10:30:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-28 10:30:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-09-28 10:30:53,204 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2018-09-28 10:30:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:53,204 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-09-28 10:30:53,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:30:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-09-28 10:30:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-28 10:30:53,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:53,205 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-09-28 10:30:53,206 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:53,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times [2018-09-28 10:30:53,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:53,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:53,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:53,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:53,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-09-28 10:30:53,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:53,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:53,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:56,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-28 10:30:56,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:56,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-09-28 10:30:56,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:56,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:30:56,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:30:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:30:56,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:56,607 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states. [2018-09-28 10:30:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:57,969 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2018-09-28 10:30:57,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:30:57,969 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-09-28 10:30:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:57,970 INFO L225 Difference]: With dead ends: 369 [2018-09-28 10:30:57,970 INFO L226 Difference]: Without dead ends: 247 [2018-09-28 10:30:57,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-28 10:30:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-28 10:30:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-28 10:30:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-09-28 10:30:57,975 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2018-09-28 10:30:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:57,975 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-09-28 10:30:57,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:30:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-09-28 10:30:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-28 10:30:57,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:57,977 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-09-28 10:30:57,977 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:57,977 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times [2018-09-28 10:30:57,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:57,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:57,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:57,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:57,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-09-28 10:30:58,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:58,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:58,359 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:59,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:30:59,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:59,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-09-28 10:31:00,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:00,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:31:00,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:31:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:31:00,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:00,252 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states. [2018-09-28 10:31:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:01,664 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-09-28 10:31:01,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:31:01,665 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-09-28 10:31:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:01,666 INFO L225 Difference]: With dead ends: 375 [2018-09-28 10:31:01,666 INFO L226 Difference]: Without dead ends: 251 [2018-09-28 10:31:01,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-28 10:31:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-28 10:31:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-28 10:31:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-09-28 10:31:01,670 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2018-09-28 10:31:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:01,670 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-09-28 10:31:01,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:31:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-09-28 10:31:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-28 10:31:01,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:01,671 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-09-28 10:31:01,671 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:01,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times [2018-09-28 10:31:01,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:01,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:01,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:01,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:01,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-09-28 10:31:02,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:02,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:02,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:02,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-09-28 10:31:02,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:02,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:31:02,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:31:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:31:02,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:02,418 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states. [2018-09-28 10:31:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:03,838 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2018-09-28 10:31:03,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:31:03,838 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-09-28 10:31:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:03,839 INFO L225 Difference]: With dead ends: 381 [2018-09-28 10:31:03,839 INFO L226 Difference]: Without dead ends: 255 [2018-09-28 10:31:03,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-28 10:31:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-28 10:31:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-28 10:31:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-09-28 10:31:03,843 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2018-09-28 10:31:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:03,844 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-09-28 10:31:03,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:31:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-09-28 10:31:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-28 10:31:03,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:03,845 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-09-28 10:31:03,845 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:03,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:03,845 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times [2018-09-28 10:31:03,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:03,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:03,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-09-28 10:31:04,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:04,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:04,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:04,348 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:04,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:04,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-09-28 10:31:04,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:04,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:31:04,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:31:04,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:31:04,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:04,616 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states. [2018-09-28 10:31:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:06,185 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2018-09-28 10:31:06,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:31:06,185 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-09-28 10:31:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:06,186 INFO L225 Difference]: With dead ends: 387 [2018-09-28 10:31:06,186 INFO L226 Difference]: Without dead ends: 259 [2018-09-28 10:31:06,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-28 10:31:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-28 10:31:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-28 10:31:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-09-28 10:31:06,191 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2018-09-28 10:31:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:06,191 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-09-28 10:31:06,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:31:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-09-28 10:31:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-28 10:31:06,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:06,193 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-09-28 10:31:06,193 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:06,193 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times [2018-09-28 10:31:06,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:06,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:06,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:06,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-09-28 10:31:06,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:06,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:06,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:09,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-28 10:31:09,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:09,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-09-28 10:31:09,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:09,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:31:09,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:31:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:31:09,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:09,293 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states. [2018-09-28 10:31:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:10,950 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2018-09-28 10:31:10,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:31:10,951 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-09-28 10:31:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:10,952 INFO L225 Difference]: With dead ends: 393 [2018-09-28 10:31:10,952 INFO L226 Difference]: Without dead ends: 263 [2018-09-28 10:31:10,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-28 10:31:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-28 10:31:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-28 10:31:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-09-28 10:31:10,958 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2018-09-28 10:31:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:10,958 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-09-28 10:31:10,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:31:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-09-28 10:31:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-28 10:31:10,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:10,960 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-09-28 10:31:10,960 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:10,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times [2018-09-28 10:31:10,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:10,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:10,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:10,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-09-28 10:31:11,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:11,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:11,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:11,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:11,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:11,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-09-28 10:31:11,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:11,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:31:11,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:31:11,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:31:11,811 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:11,811 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states. [2018-09-28 10:31:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:13,374 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2018-09-28 10:31:13,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:31:13,374 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-09-28 10:31:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:13,375 INFO L225 Difference]: With dead ends: 399 [2018-09-28 10:31:13,375 INFO L226 Difference]: Without dead ends: 267 [2018-09-28 10:31:13,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-28 10:31:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-28 10:31:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-28 10:31:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-09-28 10:31:13,381 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2018-09-28 10:31:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:13,381 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-09-28 10:31:13,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:31:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-09-28 10:31:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-28 10:31:13,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:13,383 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-09-28 10:31:13,383 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:13,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times [2018-09-28 10:31:13,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:13,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:13,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:13,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:13,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-28 10:31:13,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:13,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:13,774 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:17,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-28 10:31:17,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:17,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-28 10:31:17,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:17,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:31:17,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:31:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:31:17,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:17,404 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states. [2018-09-28 10:31:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:19,177 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-09-28 10:31:19,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:31:19,177 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-09-28 10:31:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:19,178 INFO L225 Difference]: With dead ends: 405 [2018-09-28 10:31:19,179 INFO L226 Difference]: Without dead ends: 271 [2018-09-28 10:31:19,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-28 10:31:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-28 10:31:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-28 10:31:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-09-28 10:31:19,183 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-09-28 10:31:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:19,184 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-09-28 10:31:19,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:31:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-09-28 10:31:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-28 10:31:19,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:19,185 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-09-28 10:31:19,185 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:19,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times [2018-09-28 10:31:19,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:19,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:19,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:19,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:19,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-09-28 10:31:19,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:19,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:19,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:21,328 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:31:21,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:21,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-09-28 10:31:21,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:21,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:31:21,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:31:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:31:21,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:21,613 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states. [2018-09-28 10:31:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:23,189 INFO L93 Difference]: Finished difference Result 411 states and 414 transitions. [2018-09-28 10:31:23,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:31:23,189 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-09-28 10:31:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:23,190 INFO L225 Difference]: With dead ends: 411 [2018-09-28 10:31:23,190 INFO L226 Difference]: Without dead ends: 275 [2018-09-28 10:31:23,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-28 10:31:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-28 10:31:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-28 10:31:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-09-28 10:31:23,195 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-09-28 10:31:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:23,195 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-09-28 10:31:23,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:31:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-09-28 10:31:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-28 10:31:23,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:23,197 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-09-28 10:31:23,197 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:23,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times [2018-09-28 10:31:23,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:23,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:23,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:23,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:23,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-09-28 10:31:23,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:23,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:23,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:23,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-09-28 10:31:24,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:24,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:31:24,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:31:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:31:24,076 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:24,076 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states. [2018-09-28 10:31:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:26,109 INFO L93 Difference]: Finished difference Result 417 states and 420 transitions. [2018-09-28 10:31:26,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:31:26,110 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-09-28 10:31:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:26,111 INFO L225 Difference]: With dead ends: 417 [2018-09-28 10:31:26,111 INFO L226 Difference]: Without dead ends: 279 [2018-09-28 10:31:26,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-28 10:31:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-28 10:31:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-28 10:31:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-09-28 10:31:26,116 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2018-09-28 10:31:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:26,116 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-09-28 10:31:26,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:31:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-09-28 10:31:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-28 10:31:26,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:26,118 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-09-28 10:31:26,118 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:26,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times [2018-09-28 10:31:26,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:26,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:26,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:26,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:26,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-09-28 10:31:26,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:26,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:26,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:26,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:26,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:26,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-09-28 10:31:26,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:26,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:31:26,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:31:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:31:26,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:26,945 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states. [2018-09-28 10:31:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:28,790 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2018-09-28 10:31:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:31:28,790 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-09-28 10:31:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:28,791 INFO L225 Difference]: With dead ends: 423 [2018-09-28 10:31:28,791 INFO L226 Difference]: Without dead ends: 283 [2018-09-28 10:31:28,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-28 10:31:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-28 10:31:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-28 10:31:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-09-28 10:31:28,795 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2018-09-28 10:31:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:28,796 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-09-28 10:31:28,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:31:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-09-28 10:31:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-28 10:31:28,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:28,797 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-09-28 10:31:28,797 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:28,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times [2018-09-28 10:31:28,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:28,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:28,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:28,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:28,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-09-28 10:31:29,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:29,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:29,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:32,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-28 10:31:32,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:32,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-09-28 10:31:32,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:32,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:31:32,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:31:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:31:32,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:32,875 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states. [2018-09-28 10:31:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:34,627 INFO L93 Difference]: Finished difference Result 429 states and 432 transitions. [2018-09-28 10:31:34,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:31:34,628 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-09-28 10:31:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:34,629 INFO L225 Difference]: With dead ends: 429 [2018-09-28 10:31:34,629 INFO L226 Difference]: Without dead ends: 287 [2018-09-28 10:31:34,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-28 10:31:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-28 10:31:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-28 10:31:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-09-28 10:31:34,634 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2018-09-28 10:31:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:34,634 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-09-28 10:31:34,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:31:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-09-28 10:31:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-28 10:31:34,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:34,635 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-09-28 10:31:34,635 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:34,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times [2018-09-28 10:31:34,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:34,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:34,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:34,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:34,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-09-28 10:31:35,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:35,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:35,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:35,205 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:35,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:35,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-09-28 10:31:35,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:35,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:31:35,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:31:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:31:35,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:35,549 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states. [2018-09-28 10:31:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:37,413 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-09-28 10:31:37,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:31:37,413 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-09-28 10:31:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:37,414 INFO L225 Difference]: With dead ends: 435 [2018-09-28 10:31:37,414 INFO L226 Difference]: Without dead ends: 291 [2018-09-28 10:31:37,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-28 10:31:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-28 10:31:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-28 10:31:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-09-28 10:31:37,418 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2018-09-28 10:31:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:37,419 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-09-28 10:31:37,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:31:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-09-28 10:31:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-28 10:31:37,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:37,420 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-09-28 10:31:37,421 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:37,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:37,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times [2018-09-28 10:31:37,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:37,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:37,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-09-28 10:31:37,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:37,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:37,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:42,742 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-28 10:31:42,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:42,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-09-28 10:31:43,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:43,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:31:43,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:31:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:31:43,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:43,091 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states. [2018-09-28 10:31:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:45,051 INFO L93 Difference]: Finished difference Result 441 states and 444 transitions. [2018-09-28 10:31:45,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:31:45,051 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-09-28 10:31:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:45,053 INFO L225 Difference]: With dead ends: 441 [2018-09-28 10:31:45,053 INFO L226 Difference]: Without dead ends: 295 [2018-09-28 10:31:45,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-28 10:31:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-28 10:31:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-28 10:31:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-09-28 10:31:45,058 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2018-09-28 10:31:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:45,059 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-09-28 10:31:45,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:31:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-09-28 10:31:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-28 10:31:45,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:45,060 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-09-28 10:31:45,061 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:45,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times [2018-09-28 10:31:45,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:45,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:45,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:45,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:45,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-09-28 10:31:45,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:45,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:45,534 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:48,297 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:31:48,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:48,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-09-28 10:31:48,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:48,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:31:48,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:31:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:31:48,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:48,683 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states. [2018-09-28 10:31:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:50,577 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2018-09-28 10:31:50,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:31:50,577 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-09-28 10:31:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:50,579 INFO L225 Difference]: With dead ends: 447 [2018-09-28 10:31:50,579 INFO L226 Difference]: Without dead ends: 299 [2018-09-28 10:31:50,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-28 10:31:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-28 10:31:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-28 10:31:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-09-28 10:31:50,585 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2018-09-28 10:31:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:50,585 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-09-28 10:31:50,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:31:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-09-28 10:31:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-28 10:31:50,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:50,587 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-09-28 10:31:50,587 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:50,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times [2018-09-28 10:31:50,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:50,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:50,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:50,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:50,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-09-28 10:31:51,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:51,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:51,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:51,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-09-28 10:31:51,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:51,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:31:51,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:31:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:31:51,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:51,727 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states. [2018-09-28 10:31:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:53,751 INFO L93 Difference]: Finished difference Result 453 states and 456 transitions. [2018-09-28 10:31:53,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:31:53,752 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-09-28 10:31:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:53,753 INFO L225 Difference]: With dead ends: 453 [2018-09-28 10:31:53,753 INFO L226 Difference]: Without dead ends: 303 [2018-09-28 10:31:53,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-28 10:31:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-28 10:31:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-28 10:31:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-09-28 10:31:53,757 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2018-09-28 10:31:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:53,757 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-09-28 10:31:53,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:31:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-09-28 10:31:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-28 10:31:53,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:53,758 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-09-28 10:31:53,759 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:53,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times [2018-09-28 10:31:53,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:53,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:53,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:53,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:53,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-09-28 10:31:54,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:54,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:54,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:54,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:54,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:54,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-09-28 10:31:54,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:54,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:31:54,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:31:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:31:54,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:54,871 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states. [2018-09-28 10:31:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:56,946 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-09-28 10:31:56,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:31:56,946 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-09-28 10:31:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:56,947 INFO L225 Difference]: With dead ends: 459 [2018-09-28 10:31:56,947 INFO L226 Difference]: Without dead ends: 307 [2018-09-28 10:31:56,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-28 10:31:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-28 10:31:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-28 10:31:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-09-28 10:31:56,953 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2018-09-28 10:31:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:56,953 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-09-28 10:31:56,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:31:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-09-28 10:31:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-28 10:31:56,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:56,955 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-09-28 10:31:56,955 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:56,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times [2018-09-28 10:31:56,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:56,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:56,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:56,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:56,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-09-28 10:31:57,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:57,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:57,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:02,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-28 10:32:02,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:02,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-09-28 10:32:02,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:02,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:32:02,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:32:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:32:02,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:02,680 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states. [2018-09-28 10:32:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:04,864 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2018-09-28 10:32:04,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:32:04,865 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-09-28 10:32:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:04,866 INFO L225 Difference]: With dead ends: 465 [2018-09-28 10:32:04,866 INFO L226 Difference]: Without dead ends: 311 [2018-09-28 10:32:04,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-28 10:32:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-28 10:32:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-28 10:32:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-09-28 10:32:04,870 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2018-09-28 10:32:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:04,870 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-09-28 10:32:04,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:32:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-09-28 10:32:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-28 10:32:04,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:04,872 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-09-28 10:32:04,872 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:04,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times [2018-09-28 10:32:04,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:04,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:04,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:04,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:04,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-09-28 10:32:05,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:05,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:05,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:05,494 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:05,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:05,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-09-28 10:32:05,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:05,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:32:05,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:32:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:32:05,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:05,845 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states. [2018-09-28 10:32:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:08,089 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2018-09-28 10:32:08,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:32:08,090 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-09-28 10:32:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:08,091 INFO L225 Difference]: With dead ends: 471 [2018-09-28 10:32:08,091 INFO L226 Difference]: Without dead ends: 315 [2018-09-28 10:32:08,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-28 10:32:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-28 10:32:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-28 10:32:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-09-28 10:32:08,095 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2018-09-28 10:32:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:08,096 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-09-28 10:32:08,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:32:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-09-28 10:32:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-28 10:32:08,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:08,097 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-09-28 10:32:08,097 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:08,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times [2018-09-28 10:32:08,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:08,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:08,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:08,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:08,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-09-28 10:32:08,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:08,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:08,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:17,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-28 10:32:17,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:17,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-09-28 10:32:18,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:18,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:32:18,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:32:18,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:32:18,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:18,303 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states. [2018-09-28 10:32:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:20,558 INFO L93 Difference]: Finished difference Result 477 states and 480 transitions. [2018-09-28 10:32:20,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:32:20,558 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-09-28 10:32:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:20,559 INFO L225 Difference]: With dead ends: 477 [2018-09-28 10:32:20,559 INFO L226 Difference]: Without dead ends: 319 [2018-09-28 10:32:20,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-28 10:32:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-28 10:32:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-28 10:32:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-09-28 10:32:20,565 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2018-09-28 10:32:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:20,565 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-09-28 10:32:20,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:32:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-09-28 10:32:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-28 10:32:20,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:20,566 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-09-28 10:32:20,566 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:20,566 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times [2018-09-28 10:32:20,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:20,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:20,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:20,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:20,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-09-28 10:32:21,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:21,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:21,073 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:24,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-28 10:32:24,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:24,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-09-28 10:32:25,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:25,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:32:25,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:32:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:32:25,099 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:25,099 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states. [2018-09-28 10:32:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:27,510 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2018-09-28 10:32:27,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:32:27,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-09-28 10:32:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:27,511 INFO L225 Difference]: With dead ends: 483 [2018-09-28 10:32:27,511 INFO L226 Difference]: Without dead ends: 323 [2018-09-28 10:32:27,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-28 10:32:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-28 10:32:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-28 10:32:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-09-28 10:32:27,516 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2018-09-28 10:32:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:27,516 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-09-28 10:32:27,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:32:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-09-28 10:32:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-28 10:32:27,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:27,517 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-09-28 10:32:27,517 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:27,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times [2018-09-28 10:32:27,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:27,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:27,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:27,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:27,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-09-28 10:32:28,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:28,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:28,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:28,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-09-28 10:32:28,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:28,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:32:28,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:32:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:32:28,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:28,543 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states. [2018-09-28 10:32:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:31,167 INFO L93 Difference]: Finished difference Result 489 states and 492 transitions. [2018-09-28 10:32:31,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:32:31,168 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-09-28 10:32:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:31,169 INFO L225 Difference]: With dead ends: 489 [2018-09-28 10:32:31,169 INFO L226 Difference]: Without dead ends: 327 [2018-09-28 10:32:31,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-28 10:32:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-28 10:32:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-28 10:32:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-09-28 10:32:31,175 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2018-09-28 10:32:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:31,175 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-09-28 10:32:31,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:32:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-09-28 10:32:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-28 10:32:31,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:31,177 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-09-28 10:32:31,177 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:31,177 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times [2018-09-28 10:32:31,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:31,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:31,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:31,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:31,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-09-28 10:32:31,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:31,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:31,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:31,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:31,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:31,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-09-28 10:32:32,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:32,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:32:32,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:32:32,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:32:32,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:32,338 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states. [2018-09-28 10:32:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:35,054 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2018-09-28 10:32:35,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:32:35,054 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-09-28 10:32:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:35,055 INFO L225 Difference]: With dead ends: 495 [2018-09-28 10:32:35,055 INFO L226 Difference]: Without dead ends: 331 [2018-09-28 10:32:35,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-28 10:32:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-28 10:32:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-28 10:32:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-09-28 10:32:35,061 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2018-09-28 10:32:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:35,061 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-09-28 10:32:35,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:32:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-09-28 10:32:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-28 10:32:35,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:35,063 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-09-28 10:32:35,063 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:35,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times [2018-09-28 10:32:35,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:35,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:35,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:35,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:35,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-09-28 10:32:35,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:35,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:35,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:42,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-28 10:32:42,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:42,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-09-28 10:32:42,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:42,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:32:42,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:32:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:32:42,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:42,592 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states. [2018-09-28 10:32:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:44,997 INFO L93 Difference]: Finished difference Result 501 states and 504 transitions. [2018-09-28 10:32:44,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:32:44,997 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-09-28 10:32:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:44,998 INFO L225 Difference]: With dead ends: 501 [2018-09-28 10:32:44,998 INFO L226 Difference]: Without dead ends: 335 [2018-09-28 10:32:44,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-28 10:32:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-28 10:32:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-28 10:32:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-09-28 10:32:45,003 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2018-09-28 10:32:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:45,003 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-09-28 10:32:45,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:32:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-09-28 10:32:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-28 10:32:45,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:45,004 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1] [2018-09-28 10:32:45,004 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:45,005 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times [2018-09-28 10:32:45,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:45,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:45,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:45,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:45,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-09-28 10:32:45,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:45,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:45,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:45,653 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:45,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:45,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-09-28 10:32:46,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:46,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:32:46,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:32:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:32:46,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:46,020 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states. [2018-09-28 10:32:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:49,071 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2018-09-28 10:32:49,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:32:49,072 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-09-28 10:32:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:49,073 INFO L225 Difference]: With dead ends: 507 [2018-09-28 10:32:49,073 INFO L226 Difference]: Without dead ends: 339 [2018-09-28 10:32:49,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-28 10:32:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-28 10:32:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-28 10:32:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-09-28 10:32:49,077 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-09-28 10:32:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:49,077 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-09-28 10:32:49,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:32:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-09-28 10:32:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-28 10:32:49,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:49,079 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-09-28 10:32:49,079 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:49,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:49,079 INFO L82 PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times [2018-09-28 10:32:49,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:49,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:49,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:49,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:49,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-09-28 10:32:49,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:49,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:49,613 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:58,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-28 10:32:58,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:58,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-09-28 10:32:58,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:58,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:32:58,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:32:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:32:58,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:58,891 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states. [2018-09-28 10:33:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:01,504 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2018-09-28 10:33:01,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:33:01,504 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-09-28 10:33:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:01,506 INFO L225 Difference]: With dead ends: 513 [2018-09-28 10:33:01,506 INFO L226 Difference]: Without dead ends: 343 [2018-09-28 10:33:01,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-28 10:33:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-28 10:33:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-28 10:33:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-09-28 10:33:01,510 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-09-28 10:33:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:01,510 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-09-28 10:33:01,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:33:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-09-28 10:33:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-28 10:33:01,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:01,512 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1] [2018-09-28 10:33:01,512 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:01,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:01,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times [2018-09-28 10:33:01,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:01,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:01,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:01,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:01,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-09-28 10:33:02,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:02,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:33:02,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:33:06,544 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-28 10:33:06,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:06,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-09-28 10:33:07,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:07,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:33:07,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:33:07,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:33:07,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:07,035 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states. [2018-09-28 10:33:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:09,895 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2018-09-28 10:33:09,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:33:09,895 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-09-28 10:33:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:09,896 INFO L225 Difference]: With dead ends: 519 [2018-09-28 10:33:09,896 INFO L226 Difference]: Without dead ends: 347 [2018-09-28 10:33:09,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-28 10:33:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-28 10:33:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-28 10:33:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2018-09-28 10:33:09,902 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2018-09-28 10:33:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:09,902 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2018-09-28 10:33:09,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:33:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2018-09-28 10:33:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-28 10:33:09,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:09,904 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1] [2018-09-28 10:33:09,904 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:09,904 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times [2018-09-28 10:33:09,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:09,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:09,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:09,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:09,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-09-28 10:33:10,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:10,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:33:10,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:10,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-09-28 10:33:10,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:10,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:33:10,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:33:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:33:10,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:10,964 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states. [2018-09-28 10:33:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:13,900 INFO L93 Difference]: Finished difference Result 525 states and 528 transitions. [2018-09-28 10:33:13,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:33:13,900 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-09-28 10:33:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:13,901 INFO L225 Difference]: With dead ends: 525 [2018-09-28 10:33:13,901 INFO L226 Difference]: Without dead ends: 351 [2018-09-28 10:33:13,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-28 10:33:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-28 10:33:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-28 10:33:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-09-28 10:33:13,906 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2018-09-28 10:33:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:13,907 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-09-28 10:33:13,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:33:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-09-28 10:33:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-28 10:33:13,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:13,908 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1] [2018-09-28 10:33:13,909 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:13,909 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times [2018-09-28 10:33:13,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:13,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:13,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:13,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:33:13,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-09-28 10:33:14,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:14,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:33:14,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:33:14,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:33:14,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:14,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-09-28 10:33:14,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:14,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:33:14,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:33:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:33:14,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:14,995 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states. [2018-09-28 10:33:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:17,683 INFO L93 Difference]: Finished difference Result 531 states and 534 transitions. [2018-09-28 10:33:17,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:33:17,684 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-09-28 10:33:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:17,685 INFO L225 Difference]: With dead ends: 531 [2018-09-28 10:33:17,685 INFO L226 Difference]: Without dead ends: 355 [2018-09-28 10:33:17,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-09-28 10:33:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-09-28 10:33:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-28 10:33:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-09-28 10:33:17,690 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2018-09-28 10:33:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:17,690 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-09-28 10:33:17,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:33:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-09-28 10:33:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-28 10:33:17,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:17,692 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1] [2018-09-28 10:33:17,692 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:17,692 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:17,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times [2018-09-28 10:33:17,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:17,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:17,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:17,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:17,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-09-28 10:33:18,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:18,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:33:18,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:33:26,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-28 10:33:26,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:26,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-09-28 10:33:26,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:26,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:33:26,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:33:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:33:26,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:26,698 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states. [2018-09-28 10:33:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:33:29,502 INFO L93 Difference]: Finished difference Result 537 states and 540 transitions. [2018-09-28 10:33:29,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:33:29,502 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-09-28 10:33:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:33:29,503 INFO L225 Difference]: With dead ends: 537 [2018-09-28 10:33:29,503 INFO L226 Difference]: Without dead ends: 359 [2018-09-28 10:33:29,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:33:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-28 10:33:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-09-28 10:33:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-28 10:33:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2018-09-28 10:33:29,508 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354 [2018-09-28 10:33:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:33:29,508 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2018-09-28 10:33:29,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:33:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2018-09-28 10:33:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-28 10:33:29,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:33:29,510 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1, 1, 1] [2018-09-28 10:33:29,510 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:33:29,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:33:29,510 INFO L82 PathProgramCache]: Analyzing trace with hash 956890027, now seen corresponding path program 88 times [2018-09-28 10:33:29,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:33:29,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:33:29,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:29,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:33:29,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:33:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:33:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-09-28 10:33:30,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:33:30,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:33:30,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:33:30,237 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:33:30,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:33:30,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:33:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-09-28 10:33:30,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:33:30,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:33:30,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:33:30,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:33:30,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:33:30,628 INFO L87 Difference]: Start difference. First operand 359 states and 360 transitions. Second operand 91 states. Received shutdown request... [2018-09-28 10:33:31,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:33:31,090 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:33:31,095 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:33:31,095 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:33:31 BoogieIcfgContainer [2018-09-28 10:33:31,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:33:31,096 INFO L168 Benchmark]: Toolchain (without parser) took 250231.82 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 45.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 76.2 MB). Peak memory consumption was 121.3 MB. Max. memory is 7.1 GB. [2018-09-28 10:33:31,098 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:33:31,098 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.27 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:33:31,099 INFO L168 Benchmark]: Boogie Preprocessor took 20.53 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:33:31,099 INFO L168 Benchmark]: RCFGBuilder took 341.45 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:33:31,100 INFO L168 Benchmark]: TraceAbstraction took 249820.06 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 45.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 55.1 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:33:31,103 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 0.23 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.27 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.53 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 341.45 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249820.06 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 45.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 55.1 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 56). Cancelled while BasicCegarLoop was constructing difference of abstraction (359states) and FLOYD_HOARE automaton (currently 72 states, 91 states before enhancement), while ReachableStatesComputation was computing reachable states (139 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 249.7s OverallTime, 89 OverallIterations, 89 TraceHistogramMax, 98.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 530 SDtfs, 7151 SDslu, 9875 SDs, 0 SdLazy, 10053 SolverSat, 7419 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20198 GetRequests, 16193 SyntacticMatches, 0 SemanticMatches, 4005 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 88 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 84.4s SatisfiabilityAnalysisTime, 58.9s InterpolantComputationTime, 32390 NumberOfCodeBlocks, 32390 NumberOfCodeBlocksAsserted, 2128 NumberOfCheckSat, 32213 ConstructedInterpolants, 0 QuantifiedInterpolants, 15390013 SizeOfPredicates, 0 NumberOfNonLiveVariables, 48488 ConjunctsInSsa, 4092 ConjunctsInUnsatCore, 177 InterpolantComputations, 1 PerfectInterpolantSequences, 469920/939840 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/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-33-31-113.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-33-31-113.csv Completed graceful shutdown