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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:48:50,599 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:48:50,601 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:48:50,616 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:48:50,617 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:48:50,618 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:48:50,619 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:48:50,621 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:48:50,622 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:48:50,623 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:48:50,625 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:48:50,650 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 09:48:50,667 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:48:50,667 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:48:50,668 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:48:50,668 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:48:50,672 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:48:50,672 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:48:50,672 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:48:50,673 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:48:50,673 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:48:50,673 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:48:50,673 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:48:50,673 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:48:50,674 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:48:50,675 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:48:50,675 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:48:50,675 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:48:50,676 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:48:50,677 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:48:50,677 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:48:50,677 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:48:50,677 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:48:50,677 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:48:50,678 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:48:50,678 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:48:50,678 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:48:50,678 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:48:50,678 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:48:50,679 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:48:50,679 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:48:50,679 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:48:50,679 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:48:50,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:48:50,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:48:50,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:48:50,765 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:48:50,765 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:48:50,766 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-04 09:48:50,766 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-10-04 09:48:50,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:48:50,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:48:50,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:48:50,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:48:50,818 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:48:50,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,860 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:48:50,860 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:48:50,860 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:48:50,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:48:50,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:48:50,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:48:50,863 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:48:50,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... [2018-10-04 09:48:50,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:48:50,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:48:50,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:48:50,883 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:48:50,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:48:50,948 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:48:50,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:48:50,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:48:51,129 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:48:51,129 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:48:51 BoogieIcfgContainer [2018-10-04 09:48:51,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:48:51,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:48:51,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:48:51,136 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:48:51,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:48:50" (1/2) ... [2018-10-04 09:48:51,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3295f830 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:48:51, skipping insertion in model container [2018-10-04 09:48:51,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:48:51" (2/2) ... [2018-10-04 09:48:51,140 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-04 09:48:51,151 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:48:51,164 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:48:51,214 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:48:51,215 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:48:51,215 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:48:51,215 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:48:51,215 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:48:51,215 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:48:51,215 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:48:51,216 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:48:51,216 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:48:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-04 09:48:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 09:48:51,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:51,237 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 09:48:51,239 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:51,245 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-04 09:48:51,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:51,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:51,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:48:51,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:51,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:48:51,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:48:51,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:48:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:48:51,440 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:51,442 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-04 09:48:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:51,486 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:48:51,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:48:51,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 09:48:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:51,498 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:48:51,498 INFO L226 Difference]: Without dead ends: 4 [2018-10-04 09:48:51,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:48:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-04 09:48:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-04 09:48:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-04 09:48:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-04 09:48:51,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-04 09:48:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:51,533 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-04 09:48:51,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:48:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-04 09:48:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:48:51,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:51,534 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:48:51,534 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:51,534 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:51,534 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-04 09:48:51,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:51,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:51,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:51,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:48:51,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:51,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:51,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:51,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:48:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:51,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:51,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:51,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 09:48:51,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:48:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:48:51,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:51,914 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-10-04 09:48:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:52,020 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-04 09:48:52,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:48:52,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-10-04 09:48:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:52,021 INFO L225 Difference]: With dead ends: 6 [2018-10-04 09:48:52,021 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 09:48:52,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 3 [2018-10-04 09:48:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 09:48:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 09:48:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 09:48:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 09:48:52,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 09:48:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:52,026 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 09:48:52,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:48:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 09:48:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:48:52,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:52,027 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-04 09:48:52,028 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:52,028 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-04 09:48:52,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:52,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:52,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:52,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:48:52,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:52,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:52,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:52,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:48:52,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:48:52,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:52,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:52,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:52,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 09:48:52,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:48:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:48:52,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:52,319 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-10-04 09:48:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:52,432 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-04 09:48:52,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:48:52,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-10-04 09:48:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:52,433 INFO L225 Difference]: With dead ends: 7 [2018-10-04 09:48:52,433 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:48:52,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 4 [2018-10-04 09:48:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:48:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:48:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:48:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:48:52,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 09:48:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:52,439 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:48:52,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:48:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:48:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:48:52,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:52,440 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-04 09:48:52,440 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:52,441 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-04 09:48:52,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:52,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:52,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:52,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:52,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:52,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:52,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:52,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:48:52,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:48:52,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:52,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:52,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:52,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 09:48:52,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:48:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:48:52,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:52,793 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-10-04 09:48:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:52,961 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 09:48:52,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:48:52,962 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-10-04 09:48:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:52,962 INFO L225 Difference]: With dead ends: 8 [2018-10-04 09:48:52,963 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:48:52,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-04 09:48:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:48:52,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:48:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:48:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:48:52,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 09:48:52,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:52,968 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:48:52,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:48:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:48:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:48:52,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:52,969 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-04 09:48:52,969 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:52,969 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:52,970 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-04 09:48:52,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:52,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:52,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:52,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:52,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:53,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:53,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:53,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:48:53,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:48:53,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:53,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:53,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:53,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:48:53,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:48:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:48:53,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:53,405 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-10-04 09:48:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:53,476 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:48:53,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:48:53,476 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-10-04 09:48:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:53,477 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:48:53,478 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:48:53,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 6 [2018-10-04 09:48:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:48:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:48:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:48:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:48:53,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 09:48:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:53,482 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:48:53,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:48:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:48:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:48:53,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:53,483 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-04 09:48:53,483 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:53,484 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-04 09:48:53,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:53,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:53,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:53,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:53,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:53,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:53,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:53,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:48:53,803 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:48:53,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:53,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:54,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:54,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 09:48:54,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:48:54,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:48:54,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:54,180 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-10-04 09:48:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:54,285 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 09:48:54,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:48:54,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-10-04 09:48:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:54,287 INFO L225 Difference]: With dead ends: 10 [2018-10-04 09:48:54,287 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:48:54,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 7 [2018-10-04 09:48:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:48:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:48:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:48:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:48:54,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 09:48:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:54,293 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:48:54,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:48:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:48:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:48:54,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:54,294 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-04 09:48:54,294 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:54,294 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-04 09:48:54,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:54,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:54,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:54,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:54,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:54,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:54,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:54,479 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:48:54,491 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:48:54,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:54,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:54,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:54,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 09:48:54,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:48:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:48:54,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:54,651 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-10-04 09:48:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:54,743 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:48:54,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:48:54,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-10-04 09:48:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:54,744 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:48:54,745 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:48:54,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 8 [2018-10-04 09:48:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:48:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:48:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:48:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:48:54,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 09:48:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:54,749 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:48:54,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:48:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:48:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:48:54,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:54,750 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-04 09:48:54,750 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:54,751 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-04 09:48:54,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:54,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:54,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:54,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:54,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:55,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:55,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:55,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:48:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:55,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:55,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:55,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:48:55,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:48:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:48:55,355 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:55,355 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-10-04 09:48:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:55,519 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 09:48:55,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:48:55,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-10-04 09:48:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:55,521 INFO L225 Difference]: With dead ends: 12 [2018-10-04 09:48:55,521 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:48:55,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 9 [2018-10-04 09:48:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:48:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:48:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:48:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:48:55,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 09:48:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:55,528 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:48:55,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:48:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:48:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:48:55,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:55,529 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-04 09:48:55,529 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:55,529 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-04 09:48:55,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:55,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:55,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:55,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:48:55,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:55,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:55,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:55,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:48:55,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:48:55,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:55,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:55,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:55,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 09:48:55,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:48:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:48:55,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:55,891 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-10-04 09:48:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:56,028 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:48:56,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:48:56,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-10-04 09:48:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:56,032 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:48:56,032 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:48:56,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-04 09:48:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:48:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:48:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:48:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:48:56,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 09:48:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:56,037 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:48:56,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:48:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:48:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:48:56,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:56,038 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-04 09:48:56,038 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:56,038 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-04 09:48:56,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:56,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:56,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:56,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:56,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:56,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:56,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:56,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:48:56,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:48:56,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:56,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:56,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:56,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 09:48:56,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:48:56,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:48:56,477 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:56,477 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-10-04 09:48:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:56,660 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 09:48:56,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:48:56,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-10-04 09:48:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:56,662 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:48:56,662 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:48:56,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 11 [2018-10-04 09:48:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:48:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:48:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:48:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:48:56,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 09:48:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:56,667 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:48:56,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:48:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:48:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:48:56,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:56,668 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-04 09:48:56,669 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:56,669 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-04 09:48:56,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:56,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:56,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:56,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:56,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:56,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:56,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:56,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:48:56,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:48:56,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:56,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:57,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:57,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:48:57,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:48:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:48:57,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:57,198 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-10-04 09:48:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:57,524 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:48:57,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:48:57,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-10-04 09:48:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:57,525 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:48:57,525 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:48:57,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-04 09:48:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:48:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:48:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:48:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:48:57,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 09:48:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:57,529 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:48:57,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:48:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:48:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:48:57,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:57,530 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-04 09:48:57,531 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:57,531 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:57,531 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-04 09:48:57,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:57,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:57,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:57,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:57,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:57,771 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:48:57,797 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:48:57,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:57,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:58,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:58,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:48:58,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:48:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:48:58,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:58,274 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-10-04 09:48:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:58,577 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 09:48:58,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:48:58,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-10-04 09:48:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:58,579 INFO L225 Difference]: With dead ends: 16 [2018-10-04 09:48:58,579 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:48:58,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 13 [2018-10-04 09:48:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:48:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:48:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:48:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:48:58,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 09:48:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:58,583 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:48:58,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:48:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:48:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:48:58,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:58,584 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-04 09:48:58,584 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:58,584 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-04 09:48:58,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:58,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:58,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:58,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:58,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:48:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:59,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:48:59,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:48:59,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:48:59,376 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:48:59,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:48:59,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:48:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:48:59,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:48:59,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 09:48:59,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:48:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:48:59,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:48:59,621 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-10-04 09:48:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:48:59,931 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:48:59,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:48:59,932 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-10-04 09:48:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:48:59,932 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:48:59,933 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:48:59,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 14 [2018-10-04 09:48:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:48:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:48:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:48:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:48:59,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 09:48:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:48:59,939 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:48:59,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:48:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:48:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:48:59,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:48:59,940 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-04 09:48:59,940 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:48:59,940 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:48:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-04 09:48:59,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:48:59,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:48:59,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:59,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:48:59,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:48:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:00,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:00,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:00,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:00,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:00,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:00,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:49:00,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:49:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:49:00,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:00,653 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-10-04 09:49:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:00,990 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 09:49:00,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:49:00,991 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-10-04 09:49:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:00,991 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:49:00,992 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:49:00,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 15 [2018-10-04 09:49:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:49:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:49:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:49:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:49:00,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 09:49:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:00,997 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:49:00,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:49:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:49:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:49:00,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:00,998 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-04 09:49:00,998 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:00,998 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-04 09:49:00,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:00,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:01,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:01,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:01,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:01,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:01,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:01,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:49:01,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:49:01,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:01,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:02,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:02,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 09:49:02,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:49:02,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:49:02,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:02,198 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-10-04 09:49:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:02,495 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:49:02,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:49:02,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-10-04 09:49:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:02,496 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:49:02,497 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:49:02,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 16 [2018-10-04 09:49:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:49:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:49:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:49:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:49:02,502 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 09:49:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:02,502 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:49:02,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:49:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:49:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:49:02,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:02,503 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-04 09:49:02,503 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:02,504 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-04 09:49:02,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:02,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:02,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:02,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:02,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:03,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:03,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:03,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:49:03,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:49:03,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:03,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:03,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:03,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 09:49:03,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:49:03,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:49:03,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:03,691 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-10-04 09:49:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:04,193 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 09:49:04,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:49:04,194 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-10-04 09:49:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:04,195 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:49:04,195 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:49:04,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 17 [2018-10-04 09:49:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:49:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:49:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:49:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:49:04,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 09:49:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:04,200 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:49:04,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:49:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:49:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:49:04,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:04,201 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-04 09:49:04,202 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:04,202 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-04 09:49:04,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:04,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:04,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:04,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:04,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:04,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:04,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:04,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:49:04,743 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:49:04,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:04,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:05,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:05,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:49:05,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:49:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:49:05,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:05,082 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-10-04 09:49:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:05,506 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:49:05,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:49:05,506 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-10-04 09:49:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:05,507 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:49:05,507 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:49:05,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 18 [2018-10-04 09:49:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:49:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:49:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:49:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:49:05,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 09:49:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:05,513 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:49:05,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:49:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:49:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:49:05,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:05,514 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-04 09:49:05,514 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:05,514 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-04 09:49:05,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:05,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:05,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:05,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:05,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:06,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:06,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:06,890 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:49:06,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:49:06,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:06,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:06,958 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 18 [2018-10-04 09:49:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:07,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:07,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 09:49:07,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:49:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:49:07,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:07,282 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-10-04 09:49:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:07,651 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 09:49:07,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:49:07,651 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-10-04 09:49:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:07,652 INFO L225 Difference]: With dead ends: 22 [2018-10-04 09:49:07,652 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:49:07,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 19 [2018-10-04 09:49:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:49:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:49:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:49:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:49:07,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 09:49:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:07,656 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:49:07,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:49:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:49:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:49:07,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:07,657 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-04 09:49:07,657 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:07,657 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-04 09:49:07,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:07,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:07,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:07,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:07,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:08,168 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:08,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:08,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:08,180 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:49:08,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:49:08,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:08,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:08,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:08,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 09:49:08,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:49:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:49:08,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:08,767 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-10-04 09:49:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:09,473 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:49:09,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:49:09,473 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-10-04 09:49:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:09,474 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:49:09,475 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:49:09,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 20 [2018-10-04 09:49:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:49:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:49:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:49:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:49:09,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 09:49:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:09,480 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:49:09,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:49:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:49:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:49:09,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:09,481 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-04 09:49:09,481 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:09,482 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:09,482 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-04 09:49:09,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:09,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:09,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:09,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:09,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:09,965 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:09,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:09,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:10,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:10,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:10,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:10,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:49:10,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:49:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:49:10,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:10,436 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-10-04 09:49:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:10,867 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 09:49:10,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:49:10,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-10-04 09:49:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:10,869 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:49:10,869 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:49:10,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 21 [2018-10-04 09:49:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:49:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:49:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:49:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:49:10,875 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 09:49:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:10,875 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:49:10,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:49:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:49:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:49:10,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:10,876 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-04 09:49:10,876 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:10,876 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-04 09:49:10,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:10,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:10,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:10,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:10,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:11,905 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:11,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:11,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:11,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:49:11,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:49:11,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:12,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:12,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:12,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 09:49:12,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:49:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:49:12,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:12,581 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-10-04 09:49:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:13,269 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:49:13,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:49:13,270 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-10-04 09:49:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:13,271 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:49:13,271 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:49:13,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 22 [2018-10-04 09:49:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:49:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:49:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:49:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:49:13,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 09:49:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:13,277 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:49:13,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:49:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:49:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:49:13,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:13,278 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-04 09:49:13,278 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:13,278 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-04 09:49:13,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:13,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:13,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:13,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:13,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:13,771 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:13,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:13,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:13,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:49:13,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:49:13,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:13,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:14,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:14,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 09:49:14,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:49:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:49:14,440 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:14,440 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-10-04 09:49:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:15,046 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 09:49:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:49:15,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-10-04 09:49:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:15,050 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:49:15,050 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:49:15,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 23 [2018-10-04 09:49:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:49:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:49:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:49:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:49:15,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 09:49:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:15,055 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:49:15,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:49:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:49:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:49:15,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:15,056 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-04 09:49:15,056 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:15,056 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-04 09:49:15,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:15,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:15,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:15,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:15,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:15,582 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:15,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:15,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:15,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:49:15,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:49:15,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:15,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:16,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:16,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:49:16,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:49:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:49:16,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:16,333 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-10-04 09:49:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:16,994 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:49:16,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:49:16,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-10-04 09:49:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:16,995 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:49:16,995 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:49:16,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 24 [2018-10-04 09:49:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:49:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:49:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:49:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:49:17,001 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 09:49:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:17,001 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:49:17,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:49:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:49:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:49:17,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:17,002 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-04 09:49:17,002 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:17,002 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-04 09:49:17,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:17,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:17,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:17,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:17,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:17,457 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:17,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:17,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:17,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:49:17,647 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:49:17,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:17,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:18,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:18,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:49:18,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:49:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:49:18,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:18,223 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-10-04 09:49:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:18,971 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 09:49:18,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:49:18,972 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-10-04 09:49:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:18,973 INFO L225 Difference]: With dead ends: 28 [2018-10-04 09:49:18,973 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:49:18,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 25 [2018-10-04 09:49:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:49:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:49:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:49:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:49:18,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 09:49:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:18,978 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:49:18,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:49:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:49:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:49:18,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:18,979 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-04 09:49:18,979 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:18,979 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-04 09:49:18,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:18,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:18,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:18,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:18,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:19,456 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:19,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:19,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:19,688 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:49:19,709 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:49:19,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:19,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:20,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:20,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 09:49:20,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:49:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:49:20,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:20,353 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-10-04 09:49:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:21,177 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:49:21,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:49:21,178 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-10-04 09:49:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:21,179 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:49:21,179 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:49:21,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 26 [2018-10-04 09:49:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:49:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:49:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:49:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:49:21,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 09:49:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:21,187 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:49:21,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:49:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:49:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:49:21,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:21,188 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-04 09:49:21,188 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:21,188 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-04 09:49:21,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:21,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:21,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:21,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:21,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:21,619 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:21,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:21,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:21,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:21,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:22,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:22,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:49:22,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:49:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:49:22,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:22,592 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-10-04 09:49:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:23,577 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 09:49:23,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:49:23,578 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-10-04 09:49:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:23,578 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:49:23,578 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:49:23,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.1s impTime 27 [2018-10-04 09:49:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:49:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:49:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:49:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:49:23,582 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 09:49:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:23,583 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:49:23,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:49:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:49:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:49:23,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:23,584 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-04 09:49:23,584 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:23,584 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:23,584 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-04 09:49:23,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:23,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:23,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:23,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:23,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:24,056 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:24,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:24,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:24,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:49:24,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:49:24,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:24,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:25,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:25,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 09:49:25,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:49:25,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:49:25,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:25,226 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-10-04 09:49:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:26,341 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:49:26,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:49:26,342 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-10-04 09:49:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:26,342 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:49:26,342 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:49:26,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 28 [2018-10-04 09:49:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:49:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:49:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:49:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:49:26,349 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 09:49:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:26,349 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:49:26,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:49:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:49:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:49:26,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:26,350 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-04 09:49:26,350 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:26,350 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-04 09:49:26,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:26,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:26,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:26,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:26,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:28,032 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:28,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:28,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:28,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:49:28,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:49:28,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:28,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:29,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:29,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 09:49:29,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:49:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:49:29,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:29,476 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-10-04 09:49:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:30,401 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 09:49:30,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:49:30,402 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-10-04 09:49:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:30,402 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:49:30,402 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:49:30,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 29 [2018-10-04 09:49:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:49:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:49:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:49:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:49:30,408 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 09:49:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:30,408 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:49:30,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:49:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:49:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:49:30,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:30,409 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-04 09:49:30,409 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:30,410 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-04 09:49:30,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:30,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:30,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:30,815 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:31,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:31,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:31,184 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:49:31,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:49:31,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:31,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:31,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:31,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:49:31,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:49:31,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:49:31,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:31,980 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-10-04 09:49:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:32,868 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:49:32,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:49:32,868 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-10-04 09:49:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:32,869 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:49:32,869 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:49:32,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.2s impTime 30 [2018-10-04 09:49:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:49:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:49:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:49:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:49:32,875 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 09:49:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:32,875 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:49:32,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:49:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:49:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:49:32,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:32,876 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-04 09:49:32,876 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:32,876 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:32,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-04 09:49:32,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:32,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:32,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:32,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:32,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:33,321 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:33,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:33,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:33,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:49:33,846 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:49:33,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:33,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:36,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:36,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 09:49:36,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:49:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:49:36,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:36,204 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-10-04 09:49:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:37,461 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 09:49:37,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:49:37,462 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-10-04 09:49:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:37,463 INFO L225 Difference]: With dead ends: 34 [2018-10-04 09:49:37,463 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:49:37,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 31 [2018-10-04 09:49:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:49:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:49:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:49:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:49:37,468 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 09:49:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:37,469 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:49:37,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:49:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:49:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:49:37,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:37,469 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-04 09:49:37,470 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:37,470 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-04 09:49:37,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:37,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:37,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:37,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:37,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:37,982 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:38,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:38,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:38,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:49:38,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:49:38,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:38,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:39,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:39,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 09:49:39,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:49:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:49:39,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:39,549 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-10-04 09:49:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:40,521 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:49:40,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:49:40,522 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-10-04 09:49:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:40,523 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:49:40,523 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:49:40,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 32 [2018-10-04 09:49:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:49:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:49:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:49:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:49:40,528 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 09:49:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:40,528 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:49:40,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:49:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:49:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:49:40,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:40,529 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-04 09:49:40,529 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:40,529 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-04 09:49:40,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:40,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:40,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:40,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:40,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:41,084 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:41,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:41,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:41,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:41,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:42,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:42,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:49:42,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:49:42,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:49:42,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:42,766 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-10-04 09:49:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:44,200 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 09:49:44,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:49:44,200 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-10-04 09:49:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:44,201 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:49:44,201 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:49:44,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 33 [2018-10-04 09:49:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:49:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:49:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:49:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:49:44,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 09:49:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:44,206 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:49:44,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:49:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:49:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:49:44,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:44,207 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-04 09:49:44,207 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:44,207 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-04 09:49:44,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:44,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:44,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:44,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:49:44,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:44,604 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:45,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:45,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:45,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:49:45,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:49:45,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:45,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:46,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:46,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 09:49:46,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:49:46,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:49:46,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:46,177 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-10-04 09:49:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:47,265 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:49:47,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:49:47,265 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-10-04 09:49:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:47,266 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:49:47,266 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:49:47,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 34 [2018-10-04 09:49:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:49:47,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:49:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:49:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:49:47,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 09:49:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:47,271 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:49:47,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:49:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:49:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:49:47,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:47,272 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-04 09:49:47,272 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:47,272 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-04 09:49:47,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:47,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:47,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:47,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:47,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:48,330 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:48,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:48,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:48,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:49:48,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:49:48,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:48,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:49,110 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 34 [2018-10-04 09:49:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:50,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:50,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 09:49:50,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:49:50,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:49:50,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:50,414 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-10-04 09:49:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:52,140 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 09:49:52,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:49:52,141 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-10-04 09:49:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:52,141 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:49:52,142 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:49:52,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.4s impTime 35 [2018-10-04 09:49:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:49:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:49:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:49:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:49:52,146 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 09:49:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:52,146 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:49:52,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:49:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:49:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:49:52,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:52,147 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-04 09:49:52,147 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:52,147 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:52,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-04 09:49:52,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:52,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:52,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:52,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:52,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:53,092 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:53,800 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:49:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:53,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:53,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:53,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:49:53,838 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:49:53,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:53,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:55,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:55,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:49:55,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:49:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:49:55,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:55,559 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-10-04 09:49:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:49:57,065 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:49:57,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:49:57,066 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-10-04 09:49:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:49:57,066 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:49:57,067 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:49:57,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime 36 [2018-10-04 09:49:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:49:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:49:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:49:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:49:57,070 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 09:49:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:49:57,071 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:49:57,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:49:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:49:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:49:57,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:49:57,071 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-04 09:49:57,071 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:49:57,071 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:49:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-04 09:49:57,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:49:57,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:49:57,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:57,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:49:57,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:49:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:49:57,541 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:49:58,352 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:49:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:58,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:49:58,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:49:58,419 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:49:58,450 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:49:58,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:49:58,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:49:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:49:59,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:49:59,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 09:49:59,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:49:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:49:59,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:49:59,785 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-10-04 09:50:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:01,257 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 09:50:01,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:50:01,258 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-10-04 09:50:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:01,258 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:50:01,259 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:50:01,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 37 [2018-10-04 09:50:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:50:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:50:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:50:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:50:01,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 09:50:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:01,264 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:50:01,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:50:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:50:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:50:01,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:01,265 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-04 09:50:01,265 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:01,265 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-04 09:50:01,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:01,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:01,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:01,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:01,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:01,700 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:02,394 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:02,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:02,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:02,531 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:02,560 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:50:02,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:02,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:03,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:03,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 09:50:03,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:50:03,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:50:03,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:03,787 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-10-04 09:50:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:05,363 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:50:05,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:50:05,363 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-10-04 09:50:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:05,364 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:50:05,364 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:50:05,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 38 [2018-10-04 09:50:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:50:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:50:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:50:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:50:05,369 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 09:50:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:05,369 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:50:05,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:50:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:50:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:50:05,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:05,370 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-04 09:50:05,370 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:05,370 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-04 09:50:05,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:05,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:05,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:05,772 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:06,466 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:06,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:06,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:06,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:06,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:07,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:07,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:50:07,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:50:07,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:50:07,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:07,910 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-10-04 09:50:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:09,358 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 09:50:09,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:50:09,359 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-10-04 09:50:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:09,359 INFO L225 Difference]: With dead ends: 42 [2018-10-04 09:50:09,360 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:50:09,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 39 [2018-10-04 09:50:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:50:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:50:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:50:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:50:09,364 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 09:50:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:09,364 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:50:09,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:50:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:50:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:50:09,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:09,365 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-04 09:50:09,365 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:09,365 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-04 09:50:09,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:09,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:09,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:09,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:09,905 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:10,663 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:10,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:10,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:10,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:10,915 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:10,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:10,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:12,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:12,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 09:50:12,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:50:12,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:50:12,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:12,253 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-10-04 09:50:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:13,847 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:50:13,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:50:13,847 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-10-04 09:50:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:13,848 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:50:13,848 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:50:13,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 40 [2018-10-04 09:50:13,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:50:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:50:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:50:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:50:13,852 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 09:50:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:13,852 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:50:13,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:50:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:50:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:50:13,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:13,853 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-04 09:50:13,853 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:13,854 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-04 09:50:13,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:13,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:13,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:13,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:13,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:15,498 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:16,206 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:16,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:16,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:16,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:16,530 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:50:16,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:16,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:18,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:18,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 09:50:18,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:50:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:50:18,014 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:18,014 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-10-04 09:50:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:20,079 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 09:50:20,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:50:20,080 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-10-04 09:50:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:20,080 INFO L225 Difference]: With dead ends: 44 [2018-10-04 09:50:20,080 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:50:20,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 41 [2018-10-04 09:50:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:50:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:50:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:50:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:50:20,083 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 09:50:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:20,084 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:50:20,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:50:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:50:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:50:20,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:20,084 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-04 09:50:20,085 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:20,085 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-04 09:50:20,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:20,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:20,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:20,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:20,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:21,113 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:22,095 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:22,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:22,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:22,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:22,560 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:22,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:22,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:24,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:24,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:50:24,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:50:24,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:50:24,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:24,331 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-10-04 09:50:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:26,813 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:50:26,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:50:26,813 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-10-04 09:50:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:26,814 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:50:26,814 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:50:26,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.6s impTime 42 [2018-10-04 09:50:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:50:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:50:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:50:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:50:26,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 09:50:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:26,819 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:50:26,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:50:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:50:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:50:26,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:26,820 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-04 09:50:26,820 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:26,821 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:26,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-04 09:50:26,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:26,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:26,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:26,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:26,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:27,239 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:27,994 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:28,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:28,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:28,418 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:50:28,453 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:50:28,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:28,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:30,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:30,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 09:50:30,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:50:30,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:50:30,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:30,395 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-10-04 09:50:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:32,405 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 09:50:32,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:50:32,406 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-10-04 09:50:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:32,407 INFO L225 Difference]: With dead ends: 46 [2018-10-04 09:50:32,407 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:50:32,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 3.1s impTime 43 [2018-10-04 09:50:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:50:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:50:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:50:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:50:32,411 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 09:50:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:32,412 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:50:32,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:50:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:50:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:50:32,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:32,412 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-04 09:50:32,412 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:32,413 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:32,413 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-04 09:50:32,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:32,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:32,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:32,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:32,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:33,358 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:34,077 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:34,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:34,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:34,539 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:50:34,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:50:34,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:34,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:36,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:36,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 09:50:36,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:50:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:50:36,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:36,382 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-10-04 09:50:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:38,190 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:50:38,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:50:38,190 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-10-04 09:50:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:38,191 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:50:38,191 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:50:38,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.3s impTime 44 [2018-10-04 09:50:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:50:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:50:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:50:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:50:38,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 09:50:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:38,196 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:50:38,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:50:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:50:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:50:38,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:38,196 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-04 09:50:38,196 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:38,196 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:38,197 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-04 09:50:38,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:38,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:38,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:38,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:38,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:38,609 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:39,502 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:40,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:40,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:40,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:40,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:42,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:42,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:50:42,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:50:42,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:50:42,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:42,175 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-10-04 09:50:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:44,829 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 09:50:44,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:50:44,830 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-10-04 09:50:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:44,831 INFO L225 Difference]: With dead ends: 48 [2018-10-04 09:50:44,831 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:50:44,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 3.3s impTime 45 [2018-10-04 09:50:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:50:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:50:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:50:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:50:44,834 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 09:50:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:44,834 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:50:44,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:50:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:50:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:50:44,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:44,835 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-04 09:50:44,835 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:44,835 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-04 09:50:44,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:44,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:44,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:44,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:50:44,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:45,699 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:46,397 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:46,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:46,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:47,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:50:47,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:50:47,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:47,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:48,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:48,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 09:50:48,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:50:48,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:50:48,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:48,800 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-10-04 09:50:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:50,868 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:50:50,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:50:50,868 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-10-04 09:50:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:50,869 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:50:50,869 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:50:50,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.3s impTime 46 [2018-10-04 09:50:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:50:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:50:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:50:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:50:50,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 09:50:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:50,874 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:50:50,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:50:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:50:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:50:50,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:50,874 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-04 09:50:50,875 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:50,875 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-04 09:50:50,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:50,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:50,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:50,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:50,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:51,416 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:52,082 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:52,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:52,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:52,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:50:52,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:50:52,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:52,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:50:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:54,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:50:54,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 09:50:54,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:50:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:50:54,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:50:54,808 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-10-04 09:50:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:50:57,378 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 09:50:57,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:50:57,379 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-10-04 09:50:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:50:57,379 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:50:57,379 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:50:57,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.3s impTime 47 [2018-10-04 09:50:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:50:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:50:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:50:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:50:57,383 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 09:50:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:50:57,383 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:50:57,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:50:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:50:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:50:57,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:50:57,384 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-04 09:50:57,384 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:50:57,384 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:50:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-04 09:50:57,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:50:57,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:50:57,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:57,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:50:57,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:50:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:50:57,789 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:50:58,491 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:50:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:50:59,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:50:59,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:50:59,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:50:59,209 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:50:59,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:50:59,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:01,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:01,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 09:51:01,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:51:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:51:01,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:01,403 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-10-04 09:51:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:04,057 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:51:04,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:51:04,058 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-10-04 09:51:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:04,058 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:51:04,059 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:51:04,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime 48 [2018-10-04 09:51:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:51:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:51:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:51:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:51:04,064 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 09:51:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:04,064 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:51:04,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:51:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:51:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:51:04,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:04,065 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-04 09:51:04,065 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:04,065 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-04 09:51:04,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:04,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:04,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:04,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:04,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:04,618 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:05,304 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:06,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:06,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:06,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:06,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:51:06,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:06,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:08,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:08,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:51:08,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:51:08,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:51:08,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:08,155 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-10-04 09:51:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:10,457 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 09:51:10,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:51:10,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-10-04 09:51:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:10,459 INFO L225 Difference]: With dead ends: 52 [2018-10-04 09:51:10,459 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:51:10,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime 49 [2018-10-04 09:51:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:51:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:51:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:51:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:51:10,464 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 09:51:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:10,464 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:51:10,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:51:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:51:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:51:10,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:10,465 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-04 09:51:10,465 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:10,465 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:10,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-04 09:51:10,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:10,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:10,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:10,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:10,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:10,886 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:11,738 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:12,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:12,574 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:12,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:51:12,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:12,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:14,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:14,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 09:51:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:51:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:51:14,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:14,565 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-10-04 09:51:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:16,384 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:51:16,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:51:16,384 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-10-04 09:51:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:16,385 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:51:16,385 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:51:16,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime 50 [2018-10-04 09:51:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:51:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:51:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:51:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:51:16,390 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 09:51:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:16,390 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:51:16,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:51:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:51:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:51:16,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:16,391 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-04 09:51:16,391 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:16,391 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-04 09:51:16,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:16,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:16,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:16,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:16,810 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:17,481 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:18,420 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:51:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:18,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:18,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:18,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:18,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:20,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:20,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:51:20,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:51:20,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:51:20,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:20,344 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-10-04 09:51:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:22,378 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 09:51:22,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:51:22,379 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-10-04 09:51:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:22,380 INFO L225 Difference]: With dead ends: 54 [2018-10-04 09:51:22,380 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:51:22,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.4s impTime 51 [2018-10-04 09:51:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:51:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:51:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:51:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:51:22,385 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 09:51:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:22,385 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:51:22,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:51:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:51:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:51:22,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:22,385 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-04 09:51:22,386 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:22,386 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:22,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-04 09:51:22,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:22,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:22,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:22,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:22,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:23,158 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:23,939 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:25,620 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:51:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:25,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:25,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:25,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:25,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:25,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:25,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:27,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:27,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 09:51:27,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:51:27,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:51:27,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:27,918 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-10-04 09:51:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:30,419 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:51:30,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:51:30,420 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-10-04 09:51:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:30,421 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:51:30,421 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:51:30,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime 52 [2018-10-04 09:51:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:51:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:51:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:51:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:51:30,425 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 09:51:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:30,426 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:51:30,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:51:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:51:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:51:30,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:30,427 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-04 09:51:30,427 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:30,427 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:30,427 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-04 09:51:30,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:30,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:30,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:30,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:30,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:30,961 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:31,776 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:32,761 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:51:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:32,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:32,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:32,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:32,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:51:32,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:32,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:35,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:35,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 09:51:35,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:51:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:51:35,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:35,091 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-10-04 09:51:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:37,293 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 09:51:37,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:51:37,294 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-10-04 09:51:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:37,295 INFO L225 Difference]: With dead ends: 56 [2018-10-04 09:51:37,295 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:51:37,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.9s impTime 53 [2018-10-04 09:51:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:51:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:51:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:51:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:51:37,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 09:51:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:37,300 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:51:37,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:51:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:51:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:51:37,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:37,301 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-04 09:51:37,301 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:37,301 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-04 09:51:37,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:37,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:37,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:37,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:37,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:37,872 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:38,542 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:39,496 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:51:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:39,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:39,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:39,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:39,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:39,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:39,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:42,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:42,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:51:42,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:51:42,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:51:42,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:42,108 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-10-04 09:51:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:44,461 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:51:44,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:51:44,461 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-10-04 09:51:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:44,462 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:51:44,462 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:51:44,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.1s impTime 54 [2018-10-04 09:51:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:51:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:51:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:51:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:51:44,466 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 09:51:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:44,466 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:51:44,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:51:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:51:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:51:44,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:44,466 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-04 09:51:44,467 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:44,467 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:44,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-04 09:51:44,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:44,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:44,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:44,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:44,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:44,939 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:45,613 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:46,545 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:51:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:46,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:46,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:46,944 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:47,008 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:51:47,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:47,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:49,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:49,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 09:51:49,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:51:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:51:49,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:49,430 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-10-04 09:51:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:52,423 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 09:51:52,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:51:52,423 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-10-04 09:51:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:52,424 INFO L225 Difference]: With dead ends: 58 [2018-10-04 09:51:52,424 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:51:52,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.3s impTime 55 [2018-10-04 09:51:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:51:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:51:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:51:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:51:52,429 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 09:51:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:52,429 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:51:52,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:51:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:51:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:51:52,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:52,430 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-04 09:51:52,430 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:52,430 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-04 09:51:52,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:52,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:52,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:52,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:52,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:53,005 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:51:53,682 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:51:54,621 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:51:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:54,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:54,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:54,999 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:55,044 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:51:55,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:55,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:58,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:58,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 09:51:58,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:51:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:51:58,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:58,139 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-10-04 09:52:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:01,367 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:52:01,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:52:01,367 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-10-04 09:52:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:01,368 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:52:01,368 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:52:01,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 5.0s impTime 56 [2018-10-04 09:52:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:52:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:52:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:52:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:52:01,372 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 09:52:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:01,372 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:52:01,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:52:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:52:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:52:01,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:01,373 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-04 09:52:01,373 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:01,373 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-04 09:52:01,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:01,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:01,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:01,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:01,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:01,773 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:52:02,607 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:52:03,560 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:52:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:04,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:04,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:04,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:04,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:06,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:06,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:52:06,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 09:52:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 09:52:06,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:06,724 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-10-04 09:52:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:10,694 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 09:52:10,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:52:10,694 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-10-04 09:52:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:10,695 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:52:10,695 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:52:10,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.7s impTime 57 [2018-10-04 09:52:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:52:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:52:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:52:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:52:10,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 09:52:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:10,699 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:52:10,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 09:52:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:52:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:52:10,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:10,700 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-04 09:52:10,700 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:10,700 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-04 09:52:10,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:10,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:10,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:10,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:10,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:11,076 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:52:11,745 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:52:12,864 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:52:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:13,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:13,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:13,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:13,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:13,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:13,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:16,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:16,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 09:52:16,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 09:52:16,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 09:52:16,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:16,635 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-10-04 09:52:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:21,244 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:52:21,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:52:21,245 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-10-04 09:52:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:21,245 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:52:21,246 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:52:21,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time 5.3s impTime 58 [2018-10-04 09:52:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:52:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:52:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:52:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:52:21,249 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 09:52:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:21,249 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:52:21,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 09:52:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:52:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:52:21,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:21,250 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-04 09:52:21,250 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:21,250 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:21,250 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-04 09:52:21,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:21,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:21,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:21,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:21,770 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:52:22,442 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:52:23,582 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:52:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:24,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:24,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:24,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:24,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:52:24,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:24,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:26,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:26,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 09:52:26,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 09:52:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 09:52:26,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:26,769 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-10-04 09:52:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:29,739 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 09:52:29,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:52:29,739 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-10-04 09:52:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:29,740 INFO L225 Difference]: With dead ends: 62 [2018-10-04 09:52:29,740 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:52:29,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s Time 4.8s impTime 59 [2018-10-04 09:52:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:52:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:52:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:52:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:52:29,746 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 09:52:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:29,746 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:52:29,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 09:52:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:52:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:52:29,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:29,747 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-04 09:52:29,747 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:29,747 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-04 09:52:29,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:29,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:29,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:29,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:29,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:30,109 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:52:30,794 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:52:31,746 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:52:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:32,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:32,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:32,434 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:32,467 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:32,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:32,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:35,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:35,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 09:52:35,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 09:52:35,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 09:52:35,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:35,671 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 120 states. [2018-10-04 09:52:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:39,652 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:52:39,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:52:39,653 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 60 [2018-10-04 09:52:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:39,654 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:52:39,654 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:52:39,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time 5.3s impTime 60 [2018-10-04 09:52:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:52:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:52:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:52:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:52:39,659 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 09:52:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:39,659 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:52:39,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 09:52:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:52:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:52:39,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:39,660 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-04 09:52:39,660 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:39,660 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-04 09:52:39,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:39,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:39,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:39,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:39,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:40,081 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:52:40,761 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:52:41,704 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:52:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:42,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:42,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:42,469 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:42,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:52:42,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:42,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:46,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:46,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 09:52:46,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 09:52:46,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 09:52:46,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:46,439 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 122 states. [2018-10-04 09:52:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:51,551 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 09:52:51,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:52:51,552 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 61 [2018-10-04 09:52:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:51,553 INFO L225 Difference]: With dead ends: 64 [2018-10-04 09:52:51,553 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:52:51,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time 6.0s impTime 61 [2018-10-04 09:52:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:52:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:52:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:52:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:52:51,557 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 09:52:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:51,557 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:52:51,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 09:52:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:52:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:52:51,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:51,558 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-04 09:52:51,558 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:51,558 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:51,558 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-04 09:52:51,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:51,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:51,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:51,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:51,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:52,773 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 09:52:53,562 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 09:52:54,559 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 09:52:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:55,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:55,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:55,417 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:55,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:52:55,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:55,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:58,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:58,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 09:52:58,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 09:52:58,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 09:52:58,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:58,386 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 124 states. Received shutdown request... [2018-10-04 09:52:58,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:52:58,859 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:52:58,865 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:52:58,866 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:52:58 BoogieIcfgContainer [2018-10-04 09:52:58,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:52:58,867 INFO L168 Benchmark]: Toolchain (without parser) took 248050.59 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -78.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 128.9 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. [2018-10-04 09:52:58,869 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:52:58,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.05 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:52:58,870 INFO L168 Benchmark]: Boogie Preprocessor took 19.11 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:52:58,870 INFO L168 Benchmark]: RCFGBuilder took 246.97 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:52:58,871 INFO L168 Benchmark]: TraceAbstraction took 247735.33 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -78.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 107.8 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2018-10-04 09:52:58,874 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.05 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.11 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 246.97 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247735.33 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -78.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 107.8 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was constructing difference of abstraction (63states) and FLOYD_HOARE automaton (currently 8 states, 124 states before enhancement), while ReachableStatesComputation was computing reachable states (6 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 247.6s OverallTime, 61 OverallIterations, 60 TraceHistogramMax, 85.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 122 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 113517 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3781 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 60 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 156.8s InterpolantComputationTime, 3902 NumberOfCodeBlocks, 3902 NumberOfCodeBlocksAsserted, 626 NumberOfCheckSat, 3781 ConstructedInterpolants, 0 QuantifiedInterpolants, 2036033 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7740 ConjunctsInSsa, 7560 ConjunctsInUnsatCore, 121 InterpolantComputations, 1 PerfectInterpolantSequences, 0/75640 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-52-58-890.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-52-58-890.csv Completed graceful shutdown