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/toy/tooDifficultLoopInvariant/NeonAngel01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 11:00:35,466 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 11:00:35,469 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 11:00:35,480 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 11:00:35,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 11:00:35,482 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 11:00:35,483 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 11:00:35,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 11:00:35,488 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 11:00:35,489 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 11:00:35,490 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 11:00:35,529 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 [2018-09-30 11:00:35,548 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 11:00:35,549 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 11:00:35,549 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 11:00:35,550 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 11:00:35,550 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 11:00:35,550 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 11:00:35,551 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 11:00:35,551 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 11:00:35,551 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 11:00:35,551 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 11:00:35,551 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 11:00:35,552 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 11:00:35,552 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 11:00:35,552 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 11:00:35,552 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 11:00:35,552 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 11:00:35,553 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 11:00:35,553 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 11:00:35,553 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 11:00:35,553 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 11:00:35,553 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 11:00:35,553 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 11:00:35,554 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 11:00:35,554 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 11:00:35,554 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 11:00:35,554 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 11:00:35,555 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 11:00:35,555 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 11:00:35,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 11:00:35,555 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 11:00:35,555 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 11:00:35,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 11:00:35,611 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 11:00:35,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 11:00:35,620 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 11:00:35,620 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 11:00:35,621 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl [2018-09-30 11:00:35,622 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl' [2018-09-30 11:00:35,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 11:00:35,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 11:00:35,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 11:00:35,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 11:00:35,676 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 11:00:35,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,713 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 11:00:35,713 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 11:00:35,713 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 11:00:35,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 11:00:35,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 11:00:35,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 11:00:35,717 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 11:00:35,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... [2018-09-30 11:00:35,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 11:00:35,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 11:00:35,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 11:00:35,746 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 11:00:35,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 11:00:35,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 11:00:35,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 11:00:35,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 11:00:36,022 INFO L345 CfgBuilder]: Using library mode [2018-09-30 11:00:36,023 INFO L202 PluginConnector]: Adding new model NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:00:36 BoogieIcfgContainer [2018-09-30 11:00:36,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 11:00:36,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 11:00:36,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 11:00:36,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 11:00:36,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:00:35" (1/2) ... [2018-09-30 11:00:36,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397b73e2 and model type NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:00:36, skipping insertion in model container [2018-09-30 11:00:36,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:00:36" (2/2) ... [2018-09-30 11:00:36,033 INFO L112 eAbstractionObserver]: Analyzing ICFG NeonAngel01.bpl [2018-09-30 11:00:36,044 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 11:00:36,057 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 11:00:36,117 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 11:00:36,118 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 11:00:36,118 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 11:00:36,118 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 11:00:36,118 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 11:00:36,119 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 11:00:36,119 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 11:00:36,119 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 11:00:36,119 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 11:00:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 11:00:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 11:00:36,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:36,158 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 11:00:36,159 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:36,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-30 11:00:36,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:36,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:36,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:36,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,374 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 11:00:36,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 11:00:36,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 11:00:36,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 11:00:36,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:36,396 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 11:00:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:36,585 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 11:00:36,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 11:00:36,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 11:00:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:36,598 INFO L225 Difference]: With dead ends: 13 [2018-09-30 11:00:36,599 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 11:00:36,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 11:00:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 11:00:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 11:00:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 11:00:36,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 11:00:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:36,637 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 11:00:36,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 11:00:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 11:00:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 11:00:36,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:36,638 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 11:00:36,638 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:36,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-30 11:00:36,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:36,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:36,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:36,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:36,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:36,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:36,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:36,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 11:00:36,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 11:00:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 11:00:36,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:36,796 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 11:00:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:36,896 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 11:00:36,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 11:00:36,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 11:00:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:36,897 INFO L225 Difference]: With dead ends: 8 [2018-09-30 11:00:36,897 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 11:00:36,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 11:00:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 11:00:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 11:00:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 11:00:36,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 11:00:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:36,901 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 11:00:36,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 11:00:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 11:00:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 11:00:36,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:36,902 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 11:00:36,902 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:36,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-30 11:00:36,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:36,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:36,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:36,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:36,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:36,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:37,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:37,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:37,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:37,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 11:00:37,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 11:00:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 11:00:37,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:37,056 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 11:00:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:37,201 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 11:00:37,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 11:00:37,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 11:00:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:37,202 INFO L225 Difference]: With dead ends: 9 [2018-09-30 11:00:37,202 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 11:00:37,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 11:00:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 11:00:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 11:00:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 11:00:37,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 11:00:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:37,206 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 11:00:37,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 11:00:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 11:00:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 11:00:37,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:37,207 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 11:00:37,208 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:37,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-30 11:00:37,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:37,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:37,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:37,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:37,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:37,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:37,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 11:00:37,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:37,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:37,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 11:00:37,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 11:00:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 11:00:37,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:37,501 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 11:00:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:37,612 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 11:00:37,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 11:00:37,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 11:00:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:37,614 INFO L225 Difference]: With dead ends: 10 [2018-09-30 11:00:37,614 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 11:00:37,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 11:00:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 11:00:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 11:00:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 11:00:37,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 11:00:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:37,619 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 11:00:37,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 11:00:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 11:00:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 11:00:37,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:37,620 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 11:00:37,621 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:37,621 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-30 11:00:37,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:37,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:37,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:37,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:37,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:37,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:37,715 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:37,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:37,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:37,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 11:00:37,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 11:00:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 11:00:37,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:37,852 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 11:00:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:37,913 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 11:00:37,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 11:00:37,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 11:00:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:37,915 INFO L225 Difference]: With dead ends: 11 [2018-09-30 11:00:37,915 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 11:00:37,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 11:00:37,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 11:00:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 11:00:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 11:00:37,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 11:00:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:37,920 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 11:00:37,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 11:00:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 11:00:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 11:00:37,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:37,921 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 11:00:37,921 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:37,921 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-30 11:00:37,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:37,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:37,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:37,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:37,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:38,000 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:38,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 11:00:38,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:38,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:38,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 11:00:38,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 11:00:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 11:00:38,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:38,107 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 11:00:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:38,346 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 11:00:38,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 11:00:38,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 11:00:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:38,348 INFO L225 Difference]: With dead ends: 12 [2018-09-30 11:00:38,349 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 11:00:38,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 11:00:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 11:00:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 11:00:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 11:00:38,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 11:00:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:38,358 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 11:00:38,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 11:00:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 11:00:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 11:00:38,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:38,359 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 11:00:38,359 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:38,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-30 11:00:38,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:38,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:38,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:38,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:38,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:38,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:38,660 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:38,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 11:00:38,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:38,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:38,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 11:00:38,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 11:00:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 11:00:38,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:38,750 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 11:00:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:38,864 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 11:00:38,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 11:00:38,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 11:00:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:38,865 INFO L225 Difference]: With dead ends: 13 [2018-09-30 11:00:38,865 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 11:00:38,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 11:00:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 11:00:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 11:00:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 11:00:38,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 11:00:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:38,868 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 11:00:38,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 11:00:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 11:00:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 11:00:38,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:38,869 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 11:00:38,869 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:38,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-30 11:00:38,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:38,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:38,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:38,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:38,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:38,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:38,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:38,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:39,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:39,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:39,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:39,065 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 11:00:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:39,236 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 11:00:39,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:39,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 11:00:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:39,238 INFO L225 Difference]: With dead ends: 14 [2018-09-30 11:00:39,238 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 11:00:39,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 11:00:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 11:00:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 11:00:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 11:00:39,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 11:00:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:39,241 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 11:00:39,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 11:00:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 11:00:39,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:39,242 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 11:00:39,242 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:39,243 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-30 11:00:39,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:39,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:39,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:39,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:39,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:39,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:39,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:39,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:39,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:39,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:00:39,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:00:39,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:00:39,457 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:39,457 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 11:00:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:39,657 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 11:00:39,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:39,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 11:00:39,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:39,658 INFO L225 Difference]: With dead ends: 15 [2018-09-30 11:00:39,658 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 11:00:39,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 11:00:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 11:00:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 11:00:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 11:00:39,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 11:00:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:39,663 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 11:00:39,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:00:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 11:00:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 11:00:39,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:39,664 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 11:00:39,664 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:39,664 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-30 11:00:39,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:39,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:39,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:39,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:39,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:39,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:40,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 11:00:40,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:40,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:40,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 11:00:40,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 11:00:40,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 11:00:40,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:40,176 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 11:00:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:40,266 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 11:00:40,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 11:00:40,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 11:00:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:40,267 INFO L225 Difference]: With dead ends: 16 [2018-09-30 11:00:40,268 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 11:00:40,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 11:00:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 11:00:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 11:00:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 11:00:40,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 11:00:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:40,272 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 11:00:40,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 11:00:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 11:00:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 11:00:40,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:40,273 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 11:00:40,273 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:40,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-30 11:00:40,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:40,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:40,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:40,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:40,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:40,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:40,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:40,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:40,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:40,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 11:00:40,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 11:00:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 11:00:40,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:40,501 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 11:00:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:40,603 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 11:00:40,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 11:00:40,604 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 11:00:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:40,604 INFO L225 Difference]: With dead ends: 17 [2018-09-30 11:00:40,605 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 11:00:40,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 11:00:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 11:00:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 11:00:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 11:00:40,608 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 11:00:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:40,608 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 11:00:40,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 11:00:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 11:00:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 11:00:40,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:40,609 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 11:00:40,610 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:40,610 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-30 11:00:40,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:40,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:40,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:40,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:40,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:40,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:43,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 11:00:43,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:43,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:43,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 11:00:43,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 11:00:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 11:00:43,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:43,288 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 11:00:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:43,409 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 11:00:43,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 11:00:43,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 11:00:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:43,410 INFO L225 Difference]: With dead ends: 18 [2018-09-30 11:00:43,411 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 11:00:43,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 11:00:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 11:00:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 11:00:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 11:00:43,415 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 11:00:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:43,415 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 11:00:43,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 11:00:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 11:00:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 11:00:43,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:43,416 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 11:00:43,416 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:43,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-30 11:00:43,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:43,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:43,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:43,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:43,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:43,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:43,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 11:00:43,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:43,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:43,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 11:00:43,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 11:00:43,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 11:00:43,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:43,781 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 11:00:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:43,916 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 11:00:43,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 11:00:43,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 11:00:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:43,918 INFO L225 Difference]: With dead ends: 19 [2018-09-30 11:00:43,918 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 11:00:43,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 11:00:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 11:00:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 11:00:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 11:00:43,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 11:00:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:43,923 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 11:00:43,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 11:00:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 11:00:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 11:00:43,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:43,924 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 11:00:43,924 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:43,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-30 11:00:43,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:43,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:43,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:43,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:44,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:44,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:44,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:44,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 11:00:44,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 11:00:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 11:00:44,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:44,141 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 11:00:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:44,393 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 11:00:44,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 11:00:44,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 11:00:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:44,397 INFO L225 Difference]: With dead ends: 20 [2018-09-30 11:00:44,397 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 11:00:44,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:44,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 11:00:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 11:00:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 11:00:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 11:00:44,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 11:00:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:44,402 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 11:00:44,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 11:00:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 11:00:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:44,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:44,403 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 11:00:44,403 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:44,403 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-30 11:00:44,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:44,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:44,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:44,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:44,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:44,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:44,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:44,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:44,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:44,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 11:00:44,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 11:00:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 11:00:44,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:44,790 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 11:00:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:44,904 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 11:00:44,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 11:00:44,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 11:00:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:44,905 INFO L225 Difference]: With dead ends: 21 [2018-09-30 11:00:44,906 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 11:00:44,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 11:00:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 11:00:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 11:00:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 11:00:44,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 11:00:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:44,909 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 11:00:44,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 11:00:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 11:00:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 11:00:44,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:44,910 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 11:00:44,910 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:44,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-30 11:00:44,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:44,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:44,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:44,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:45,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:45,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:45,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:47,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:00:47,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:47,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:47,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:47,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 11:00:47,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 11:00:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 11:00:47,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:47,530 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 11:00:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:47,757 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 11:00:47,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 11:00:47,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 11:00:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:47,758 INFO L225 Difference]: With dead ends: 22 [2018-09-30 11:00:47,758 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 11:00:47,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 11:00:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 11:00:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 11:00:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 11:00:47,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 11:00:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:47,764 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 11:00:47,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 11:00:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 11:00:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:47,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:47,765 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 11:00:47,765 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:47,765 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-30 11:00:47,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:47,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:47,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:47,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:48,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:48,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:48,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:48,155 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:48,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:48,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:48,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:48,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 11:00:48,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 11:00:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 11:00:48,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:48,235 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 11:00:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:48,383 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 11:00:48,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 11:00:48,384 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 11:00:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:48,384 INFO L225 Difference]: With dead ends: 23 [2018-09-30 11:00:48,384 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 11:00:48,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 11:00:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 11:00:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 11:00:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 11:00:48,389 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 11:00:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:48,389 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 11:00:48,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 11:00:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 11:00:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 11:00:48,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:48,390 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 11:00:48,390 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:48,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-30 11:00:48,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:48,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:48,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:48,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:48,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:48,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:37,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 11:01:37,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:38,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:38,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:38,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 11:01:38,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 11:01:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 11:01:38,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:38,639 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 11:01:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:38,847 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 11:01:38,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 11:01:38,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 11:01:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:38,848 INFO L225 Difference]: With dead ends: 24 [2018-09-30 11:01:38,848 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 11:01:38,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 11:01:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 11:01:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 11:01:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 11:01:38,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 11:01:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:38,853 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 11:01:38,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 11:01:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 11:01:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 11:01:38,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:38,854 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 11:01:38,854 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:38,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:38,854 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-30 11:01:38,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:38,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:38,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:38,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:38,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:39,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:39,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:39,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:40,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 11:01:40,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:40,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:41,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 11:01:41,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 11:01:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 11:01:41,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:41,096 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 11:01:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:41,247 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 11:01:41,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 11:01:41,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 11:01:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:41,249 INFO L225 Difference]: With dead ends: 25 [2018-09-30 11:01:41,249 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 11:01:41,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 11:01:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 11:01:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 11:01:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 11:01:41,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 11:01:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:41,254 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 11:01:41,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 11:01:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 11:01:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 11:01:41,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:41,255 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 11:01:41,256 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:41,256 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-30 11:01:41,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:41,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:41,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:41,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:41,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:41,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:41,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:41,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 11:01:41,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 11:01:41,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 11:01:41,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:41,553 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 11:01:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:41,844 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 11:01:41,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 11:01:41,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 11:01:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:41,846 INFO L225 Difference]: With dead ends: 26 [2018-09-30 11:01:41,846 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 11:01:41,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 11:01:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 11:01:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:01:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 11:01:41,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 11:01:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:41,850 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 11:01:41,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 11:01:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 11:01:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 11:01:41,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:41,851 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 11:01:41,851 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:41,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-30 11:01:41,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:41,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:41,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:41,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:42,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:42,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:42,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:42,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:42,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:42,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 11:01:42,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 11:01:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 11:01:42,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:42,217 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 11:01:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:42,418 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 11:01:42,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 11:01:42,420 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 11:01:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:42,421 INFO L225 Difference]: With dead ends: 27 [2018-09-30 11:01:42,421 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 11:01:42,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 11:01:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 11:01:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 11:01:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 11:01:42,424 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 11:01:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:42,425 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 11:01:42,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 11:01:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 11:01:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 11:01:42,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:42,426 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 11:01:42,426 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:42,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-30 11:01:42,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:42,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:42,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:42,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:42,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:42,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:42,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:14,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 11:02:14,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:14,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:14,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:14,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 11:02:14,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 11:02:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 11:02:14,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:14,990 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 11:02:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:15,326 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 11:02:15,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 11:02:15,328 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 11:02:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:15,329 INFO L225 Difference]: With dead ends: 28 [2018-09-30 11:02:15,329 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 11:02:15,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 11:02:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 11:02:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:02:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 11:02:15,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 11:02:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:15,334 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 11:02:15,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 11:02:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 11:02:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 11:02:15,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:15,335 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 11:02:15,335 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:15,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-30 11:02:15,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:15,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:15,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:15,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:15,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:15,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:15,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:15,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:15,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:15,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:15,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:15,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:15,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 11:02:15,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 11:02:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 11:02:15,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:15,729 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 11:02:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:16,226 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 11:02:16,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 11:02:16,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 11:02:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:16,227 INFO L225 Difference]: With dead ends: 29 [2018-09-30 11:02:16,227 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 11:02:16,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 11:02:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 11:02:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 11:02:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 11:02:16,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 11:02:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:16,233 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 11:02:16,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 11:02:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 11:02:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 11:02:16,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:16,234 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 11:02:16,234 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:16,234 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-30 11:02:16,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:16,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:16,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:16,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:16,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:16,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:16,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:03:30,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 11:03:30,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:31,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:31,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:31,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 11:03:31,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 11:03:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 11:03:31,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:31,504 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 11:03:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:31,895 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 11:03:31,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 11:03:31,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 11:03:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:31,897 INFO L225 Difference]: With dead ends: 30 [2018-09-30 11:03:31,897 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 11:03:31,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 11:03:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 11:03:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:03:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 11:03:31,901 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 11:03:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:31,901 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 11:03:31,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 11:03:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 11:03:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 11:03:31,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:31,902 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 11:03:31,903 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:31,903 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-30 11:03:31,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:31,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:31,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:31,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:31,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:32,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:32,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:32,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:03:39,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 11:03:39,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:39,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:39,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:39,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 11:03:39,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 11:03:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 11:03:39,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:39,872 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 11:03:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:40,105 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 11:03:40,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 11:03:40,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 11:03:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:40,106 INFO L225 Difference]: With dead ends: 31 [2018-09-30 11:03:40,106 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 11:03:40,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 11:03:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 11:03:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 11:03:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 11:03:40,111 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 11:03:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:40,112 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 11:03:40,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 11:03:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 11:03:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 11:03:40,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:40,112 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 11:03:40,114 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:40,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:40,114 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-30 11:03:40,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:40,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:40,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:40,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:40,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:40,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:40,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:40,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:40,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:40,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:40,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 11:03:40,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 11:03:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 11:03:40,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:40,995 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 11:03:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:41,160 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 11:03:41,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 11:03:41,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 11:03:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:41,161 INFO L225 Difference]: With dead ends: 32 [2018-09-30 11:03:41,161 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 11:03:41,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 11:03:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 11:03:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:03:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 11:03:41,165 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 11:03:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:41,166 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 11:03:41,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 11:03:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 11:03:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 11:03:41,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:41,166 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 11:03:41,167 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:41,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:41,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-30 11:03:41,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:41,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:41,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:41,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:03:41,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:41,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:41,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:41,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:03:41,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:03:41,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:03:41,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:03:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:41,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:03:41,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 11:03:41,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 11:03:41,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 11:03:41,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:03:41,937 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 11:03:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:03:42,144 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 11:03:42,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 11:03:42,145 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 11:03:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:03:42,145 INFO L225 Difference]: With dead ends: 33 [2018-09-30 11:03:42,146 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 11:03:42,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:03:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 11:03:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 11:03:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 11:03:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 11:03:42,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 11:03:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:03:42,150 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 11:03:42,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 11:03:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 11:03:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 11:03:42,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:03:42,151 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 11:03:42,151 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:03:42,151 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:03:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-30 11:03:42,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:03:42,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:03:42,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:42,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:03:42,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:03:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:03:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:03:42,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:03:42,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:03:42,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:04:35,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 11:04:35,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:35,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:35,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:35,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 11:04:35,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 11:04:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 11:04:35,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:35,825 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 11:04:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:35,972 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 11:04:35,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 11:04:35,972 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 11:04:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:35,973 INFO L225 Difference]: With dead ends: 34 [2018-09-30 11:04:35,973 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 11:04:35,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 11:04:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 11:04:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:04:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 11:04:35,977 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 11:04:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:35,978 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 11:04:35,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 11:04:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 11:04:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 11:04:35,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:35,978 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 11:04:35,979 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:35,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-30 11:04:35,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:35,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:35,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:35,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:35,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:37,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:37,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:37,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:04:37,427 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:04:37,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:04:37,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:04:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:37,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:04:37,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 11:04:37,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 11:04:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 11:04:37,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:04:37,530 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 11:04:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:04:37,714 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 11:04:37,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 11:04:37,714 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 11:04:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:04:37,715 INFO L225 Difference]: With dead ends: 35 [2018-09-30 11:04:37,715 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 11:04:37,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:04:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 11:04:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 11:04:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 11:04:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 11:04:37,718 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 11:04:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:04:37,719 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 11:04:37,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 11:04:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 11:04:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 11:04:37,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:04:37,720 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 11:04:37,720 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:04:37,720 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:04:37,720 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-30 11:04:37,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:04:37,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:04:37,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:37,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:04:37,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:04:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:04:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:04:37,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:04:37,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:04:37,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown