java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:37:23,796 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:37:23,798 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:37:23,810 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:37:23,811 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:37:23,812 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:37:23,813 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:37:23,817 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:37:23,820 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:37:23,821 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:37:23,824 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 14:37:23,824 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 14:37:23,825 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 14:37:23,826 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 14:37:23,835 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 14:37:23,836 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 14:37:23,837 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 14:37:23,839 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 14:37:23,844 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 14:37:23,847 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 14:37:23,849 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 14:37:23,851 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 14:37:23,854 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 14:37:23,874 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 14:37:23,899 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:37:23,899 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:37:23,900 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:37:23,900 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:37:23,901 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:37:23,901 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:37:23,901 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:37:23,902 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:37:23,902 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:37:23,902 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:37:23,902 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:37:23,902 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:37:23,903 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:37:23,903 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:37:23,903 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:37:23,903 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:37:23,903 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:37:23,904 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:37:23,904 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:37:23,904 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:37:23,904 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:37:23,905 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:37:23,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:37:23,905 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:37:23,905 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:37:23,905 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:37:23,906 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:37:23,906 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:37:23,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:37:23,906 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:37:23,907 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:37:23,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:37:23,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:37:23,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:37:23,980 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:37:23,980 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:37:23,981 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl [2018-10-04 14:37:23,981 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl' [2018-10-04 14:37:24,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:37:24,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:37:24,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:37:24,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:37:24,039 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:37:24,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,079 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 14:37:24,079 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 14:37:24,080 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 14:37:24,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:37:24,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:37:24,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:37:24,084 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:37:24,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/1) ... [2018-10-04 14:37:24,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:37:24,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:37:24,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:37:24,111 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:37:24,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (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 14:37:24,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 14:37:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 14:37:24,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 14:37:24,304 INFO L338 CfgBuilder]: Using library mode [2018-10-04 14:37:24,305 INFO L202 PluginConnector]: Adding new model NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:37:24 BoogieIcfgContainer [2018-10-04 14:37:24,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:37:24,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:37:24,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:37:24,311 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:37:24,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:24" (1/2) ... [2018-10-04 14:37:24,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca151ca and model type NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:37:24, skipping insertion in model container [2018-10-04 14:37:24,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:37:24" (2/2) ... [2018-10-04 14:37:24,314 INFO L112 eAbstractionObserver]: Analyzing ICFG NeonAngel01.bpl [2018-10-04 14:37:24,326 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:37:24,333 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:37:24,389 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:37:24,390 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:37:24,390 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:37:24,390 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:37:24,391 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:37:24,391 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:37:24,391 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:37:24,391 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:37:24,391 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:37:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 14:37:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 14:37:24,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:24,423 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 14:37:24,424 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:24,431 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-04 14:37:24,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:24,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:24,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:24,560 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 14:37:24,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:37:24,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 14:37:24,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:37:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:37:24,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:24,582 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 14:37:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:24,639 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 14:37:24,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:37:24,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 14:37:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:24,652 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:37:24,652 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 14:37:24,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:37:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 14:37:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 14:37:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 14:37:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 14:37:24,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 14:37:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:24,689 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 14:37:24,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:37:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 14:37:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:37:24,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:24,690 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:37:24,690 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:24,690 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-04 14:37:24,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:24,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:24,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:24,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:24,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:24,853 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 14:37:24,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:24,854 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 14:37:24,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:24,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:24,943 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 14:37:24,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:24,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:37:24,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:37:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:37:24,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:24,975 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-04 14:37:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:25,013 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 14:37:25,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:37:25,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 14:37:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:25,015 INFO L225 Difference]: With dead ends: 8 [2018-10-04 14:37:25,016 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 14:37:25,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-04 14:37:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 14:37:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 14:37:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 14:37:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 14:37:25,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 14:37:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:25,019 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 14:37:25,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:37:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 14:37:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:37:25,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:25,020 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 14:37:25,021 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:25,021 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-04 14:37:25,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:25,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:25,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:25,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:25,103 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 14:37:25,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:25,104 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 14:37:25,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:25,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:25,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:25,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:25,168 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 14:37:25,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:25,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:37:25,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:37:25,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:37:25,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:25,189 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 14:37:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:25,224 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 14:37:25,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:37:25,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 14:37:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:25,225 INFO L225 Difference]: With dead ends: 9 [2018-10-04 14:37:25,226 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:37:25,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 14:37:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:37:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:37:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:37:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:37:25,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 14:37:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:25,229 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:37:25,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:37:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:37:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:37:25,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:25,230 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 14:37:25,230 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:25,231 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-04 14:37:25,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:25,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:25,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:25,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:25,361 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 14:37:25,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:25,362 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 14:37:25,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:25,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:37:25,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:25,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:25,461 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 14:37:25,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:25,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:37:25,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:37:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:37:25,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:25,482 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 14:37:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:25,511 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 14:37:25,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:37:25,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 14:37:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:25,513 INFO L225 Difference]: With dead ends: 10 [2018-10-04 14:37:25,513 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:37:25,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 14:37:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:37:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:37:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:37:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 14:37:25,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 14:37:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:25,516 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 14:37:25,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:37:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 14:37:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 14:37:25,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:25,517 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 14:37:25,517 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:25,518 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:25,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-04 14:37:25,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:25,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:25,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:25,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:25,823 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 14:37:25,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:25,823 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 14:37:25,832 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:25,843 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:25,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:25,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:25,876 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 14:37:25,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:25,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:37:25,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:37:25,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:37:25,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:25,898 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 14:37:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:25,966 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 14:37:25,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:37:25,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 14:37:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:25,968 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:37:25,969 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:37:25,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 5 [2018-10-04 14:37:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:37:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:37:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:37:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:37:25,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 14:37:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:25,973 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:37:25,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:37:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:37:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:37:25,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:25,975 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 14:37:25,975 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:25,975 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:25,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-04 14:37:25,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:25,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:25,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:25,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:26,099 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 14:37:26,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:26,099 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 14:37:26,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:26,184 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:37:26,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:26,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:26,261 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 14:37:26,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:26,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:37:26,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:37:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:37:26,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:26,289 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 14:37:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:26,324 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 14:37:26,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:37:26,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 14:37:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:26,325 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:37:26,325 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:37:26,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:37:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:37:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 14:37:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:37:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 14:37:26,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 14:37:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:26,329 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 14:37:26,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:37:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 14:37:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:37:26,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:26,330 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 14:37:26,330 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:26,330 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:26,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-04 14:37:26,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:26,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:26,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:26,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:26,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:26,438 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 14:37:26,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:26,438 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 14:37:26,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:26,459 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 14:37:26,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:26,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:26,507 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 14:37:26,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:26,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:37:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:37:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:37:26,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:26,528 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 14:37:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:26,555 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 14:37:26,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:37:26,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 14:37:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:26,557 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:37:26,557 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:37:26,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 14:37:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:37:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:37:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:37:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:37:26,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 14:37:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:26,562 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:37:26,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:37:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:37:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:37:26,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:26,563 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 14:37:26,563 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:26,563 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-04 14:37:26,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:26,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:26,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:26,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:26,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:27,069 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 14:37:27,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:27,070 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 14:37:27,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:27,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:27,136 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 14:37:27,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:27,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:37:27,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:37:27,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:37:27,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:27,158 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 14:37:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:27,228 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 14:37:27,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:37:27,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 14:37:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:27,229 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:37:27,229 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 14:37:27,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 14:37:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 14:37:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 14:37:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:37:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 14:37:27,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 14:37:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:27,233 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 14:37:27,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:37:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 14:37:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:37:27,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:27,233 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 14:37:27,234 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:27,234 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-04 14:37:27,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:27,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:27,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:27,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:27,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:27,410 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 14:37:27,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:27,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:37:27,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:27,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:27,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:27,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:27,601 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 14:37:27,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:27,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:37:27,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:37:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:37:27,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:27,629 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 14:37:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:27,683 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 14:37:27,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:37:27,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 14:37:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:27,685 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:37:27,685 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:37:27,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 9 [2018-10-04 14:37:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:37:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:37:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:37:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:37:27,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 14:37:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:27,690 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:37:27,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:37:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:37:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:37:27,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:27,691 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 14:37:27,691 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:27,691 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-04 14:37:27,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:27,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:27,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:27,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:27,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:27,838 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 14:37:27,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:27,838 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 14:37:27,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:28,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:37:28,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:28,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:28,212 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 14:37:28,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:28,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:37:28,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:37:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:37:28,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:28,236 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 14:37:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:28,266 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 14:37:28,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:37:28,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 14:37:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:28,267 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:37:28,267 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:37:28,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 14:37:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:37:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 14:37:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:37:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 14:37:28,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 14:37:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:28,272 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 14:37:28,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:37:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 14:37:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 14:37:28,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:28,273 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 14:37:28,273 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:28,274 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-04 14:37:28,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:28,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:28,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:28,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:28,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:28,568 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 14:37:28,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:28,568 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 14:37:28,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:28,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:28,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:28,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:28,637 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 14:37:28,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:28,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:37:28,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:37:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:37:28,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:28,660 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 14:37:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:28,729 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 14:37:28,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:37:28,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 14:37:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:28,730 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:37:28,730 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:37:28,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 14:37:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:37:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:37:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:37:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:37:28,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 14:37:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:28,734 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:37:28,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:37:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:37:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:37:28,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:28,735 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 14:37:28,735 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:28,735 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-04 14:37:28,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:28,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:28,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:28,908 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 14:37:28,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:28,909 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 14:37:28,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:31,373 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:37:31,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:31,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:31,427 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 14:37:31,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:31,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:37:31,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:37:31,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:37:31,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:31,450 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 14:37:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:31,495 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 14:37:31,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:37:31,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 14:37:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:31,496 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:37:31,497 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:37:31,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 12 [2018-10-04 14:37:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:37:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 14:37:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:37:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 14:37:31,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 14:37:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:31,501 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 14:37:31,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:37:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 14:37:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 14:37:31,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:31,501 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 14:37:31,502 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:31,502 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-04 14:37:31,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:31,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:31,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:31,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:31,760 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 14:37:31,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:31,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:37:31,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:31,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:37:31,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:31,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:31,854 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 14:37:31,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:31,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:37:31,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:37:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:37:31,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:31,880 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 14:37:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:31,919 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 14:37:31,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:37:31,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 14:37:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:31,920 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:37:31,921 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:37:31,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 14:37:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:37:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:37:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:37:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:37:31,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 14:37:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:31,926 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:37:31,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:37:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:37:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:37:31,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:31,927 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 14:37:31,928 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:31,928 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-04 14:37:31,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:31,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:32,129 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 14:37:32,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:32,129 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 14:37:32,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:32,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:32,202 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 14:37:32,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:32,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:37:32,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:37:32,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:37:32,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:32,224 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 14:37:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:32,397 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 14:37:32,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:37:32,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 14:37:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:32,400 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:37:32,400 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 14:37:32,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-04 14:37:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 14:37:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 14:37:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 14:37:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 14:37:32,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 14:37:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:32,404 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 14:37:32,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:37:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 14:37:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:37:32,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:32,405 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 14:37:32,405 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:32,405 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-04 14:37:32,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:32,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:32,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:32,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:32,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:32,642 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 14:37:32,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:32,643 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 14:37:32,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:32,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:32,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:32,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:32,737 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 14:37:32,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:32,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:37:32,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:37:32,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:37:32,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:32,758 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 14:37:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:32,804 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 14:37:32,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:37:32,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 14:37:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:32,805 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:37:32,805 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:37:32,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 14:37:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:37:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:37:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:37:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:37:32,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 14:37:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:32,809 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:37:32,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:37:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:37:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:37:32,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:32,810 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 14:37:32,810 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:32,810 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:32,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-04 14:37:32,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:32,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:32,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:32,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:32,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:33,068 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 14:37:33,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:33,069 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 14:37:33,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:35,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:37:35,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:35,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:35,524 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 14:37:35,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:35,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:37:35,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:37:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:37:35,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:35,546 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 14:37:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:35,601 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 14:37:35,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:37:35,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 14:37:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:35,603 INFO L225 Difference]: With dead ends: 22 [2018-10-04 14:37:35,603 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:37:35,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 16 [2018-10-04 14:37:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:37:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 14:37:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:37:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 14:37:35,608 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 14:37:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:35,608 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 14:37:35,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:37:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 14:37:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 14:37:35,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:35,609 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 14:37:35,610 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:35,610 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-04 14:37:35,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:35,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:35,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:35,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:35,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:36,275 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 14:37:36,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:36,276 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 14:37:36,284 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:36,311 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:36,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:36,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:36,392 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 14:37:36,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:36,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:37:36,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:37:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:37:36,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:36,413 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 14:37:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:36,488 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 14:37:36,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:37:36,489 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 14:37:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:36,489 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:37:36,489 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:37:36,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 17 [2018-10-04 14:37:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:37:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:37:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:37:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:37:36,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 14:37:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:36,493 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:37:36,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:37:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:37:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:37:36,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:36,494 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 14:37:36,495 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:36,495 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:36,495 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-04 14:37:36,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:36,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:36,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:36,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:36,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:36,732 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 14:37:36,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:36,733 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 14:37:36,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:28,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:38:28,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:28,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:29,053 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 14:38:29,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:29,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:38:29,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:38:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:38:29,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:29,085 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 14:38:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:29,165 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 14:38:29,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:38:29,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 14:38:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:29,166 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:38:29,166 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:38:29,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-04 14:38:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:38:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 14:38:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:38:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 14:38:29,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 14:38:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:29,171 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 14:38:29,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:38:29,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 14:38:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 14:38:29,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:29,172 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 14:38:29,175 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:29,175 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-04 14:38:29,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:29,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:29,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:29,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:29,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:29,480 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 14:38:29,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:29,481 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 14:38:29,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:31,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 14:38:31,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:31,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:31,450 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 14:38:31,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:31,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 14:38:31,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:38:31,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:38:31,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:31,480 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 14:38:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:31,522 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 14:38:31,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:38:31,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 14:38:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:31,523 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:38:31,524 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:38:31,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 19 [2018-10-04 14:38:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:38:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:38:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:38:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:38:31,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 14:38:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:31,529 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:38:31,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:38:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:38:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:38:31,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:31,530 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 14:38:31,531 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:31,531 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-04 14:38:31,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:31,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:31,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:31,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:31,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:31,812 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 14:38:31,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:31,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:38:31,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:31,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:31,922 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 14:38:31,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:31,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 14:38:31,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:38:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:38:31,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:31,944 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 14:38:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:32,030 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 14:38:32,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:38:32,030 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 14:38:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:32,031 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:38:32,031 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 14:38:32,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 20 [2018-10-04 14:38:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 14:38:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 14:38:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:38:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 14:38:32,035 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 14:38:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:32,035 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 14:38:32,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:38:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 14:38:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:38:32,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:32,036 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 14:38:32,036 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:32,037 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-04 14:38:32,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:32,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:32,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:32,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:32,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:32,482 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 14:38:32,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:32,483 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 14:38:32,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:32,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:32,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:32,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:32,559 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 14:38:32,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:38:32,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 14:38:32,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:38:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:38:32,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:32,582 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 14:38:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:32,626 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 14:38:32,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:38:32,631 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 14:38:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:32,631 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:38:32,632 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:38:32,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 21 [2018-10-04 14:38:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:38:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:38:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:38:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:38:32,634 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 14:38:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:32,635 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:38:32,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:38:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:38:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:38:32,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:32,635 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 14:38:32,636 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:38:32,636 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-04 14:38:32,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:32,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:32,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:32,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:32,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:33,024 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 14:38:33,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:38:33,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:38:33,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:05,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:39:05,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:05,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:05,258 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 14:39:05,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:05,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 14:39:05,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:39:05,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:39:05,299 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:05,299 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 14:39:05,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:05,562 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 14:39:05,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:39:05,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 14:39:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:05,564 INFO L225 Difference]: With dead ends: 28 [2018-10-04 14:39:05,564 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:39:05,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 22 [2018-10-04 14:39:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:39:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 14:39:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 14:39:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 14:39:05,567 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 14:39:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:05,568 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 14:39:05,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:39:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 14:39:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 14:39:05,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:05,568 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 14:39:05,569 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:05,569 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-04 14:39:05,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:05,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:05,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:05,776 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 14:39:05,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:05,776 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 14:39:05,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:05,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:05,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:05,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:05,919 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 14:39:05,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:39:05,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 14:39:05,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:39:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:39:05,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:05,952 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 14:39:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:06,046 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 14:39:06,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:39:06,047 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 14:39:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:06,047 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:39:06,047 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:39:06,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 23 [2018-10-04 14:39:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:39:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:39:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:39:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:39:06,052 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 14:39:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:06,052 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:39:06,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:39:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:39:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:39:06,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:06,053 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 14:39:06,053 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:39:06,054 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-04 14:39:06,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:06,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:06,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:06,310 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 14:39:06,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:39:06,311 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 14:39:06,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:40:23,784 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:40:23,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:24,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:24,446 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 14:40:24,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:24,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 14:40:24,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:40:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:40:24,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:24,469 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 14:40:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:24,535 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 14:40:24,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:40:24,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 14:40:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:24,536 INFO L225 Difference]: With dead ends: 30 [2018-10-04 14:40:24,536 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:40:24,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 24 [2018-10-04 14:40:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:40:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 14:40:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:40:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 14:40:24,542 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 14:40:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:24,542 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 14:40:24,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:40:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 14:40:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 14:40:24,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:24,545 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 14:40:24,545 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:24,545 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-04 14:40:24,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:24,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:24,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:24,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:24,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:24,824 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 14:40:24,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:24,824 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 14:40:24,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:40:32,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:40:32,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:32,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:32,589 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 14:40:32,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:32,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 14:40:32,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:40:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:40:32,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:32,612 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 14:40:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:32,673 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 14:40:32,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:40:32,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 14:40:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:32,674 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:40:32,674 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:40:32,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 25 [2018-10-04 14:40:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:40:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:40:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:40:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:40:32,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 14:40:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:32,684 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:40:32,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:40:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:40:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:40:32,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:32,685 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 14:40:32,685 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:32,685 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-04 14:40:32,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:32,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:32,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:32,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:32,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:33,057 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 14:40:33,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:33,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:40:33,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:33,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:33,146 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 14:40:33,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:33,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 14:40:33,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:40:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:40:33,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:33,167 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 14:40:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:33,217 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 14:40:33,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:40:33,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 14:40:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:33,218 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:40:33,218 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 14:40:33,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 26 [2018-10-04 14:40:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 14:40:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 14:40:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 14:40:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 14:40:33,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 14:40:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:33,222 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 14:40:33,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:40:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 14:40:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:40:33,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:33,222 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 14:40:33,223 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:33,223 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-04 14:40:33,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:33,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:33,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:33,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:33,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:34,183 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 14:40:34,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:34,184 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 14:40:34,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:34,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:34,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:34,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:34,269 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 14:40:34,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:40:34,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 14:40:34,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:40:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:40:34,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:34,291 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 14:40:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:34,370 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 14:40:34,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:40:34,371 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 14:40:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:34,371 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:40:34,372 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:40:34,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 27 [2018-10-04 14:40:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:40:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:40:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:40:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:40:34,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 14:40:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:34,376 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:40:34,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:40:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:40:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:40:34,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:34,377 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 14:40:34,377 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:40:34,377 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-04 14:40:34,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:34,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:34,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:34,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:34,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:34,821 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 14:40:34,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:40:34,821 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 14:40:34,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:41:28,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:41:28,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:29,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:29,087 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 14:41:29,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:29,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 14:41:29,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:41:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:41:29,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:29,109 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 14:41:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:29,145 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 14:41:29,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:41:29,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 14:41:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:29,146 INFO L225 Difference]: With dead ends: 34 [2018-10-04 14:41:29,146 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:41:29,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 28 [2018-10-04 14:41:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:41:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 14:41:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:41:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 14:41:29,150 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 14:41:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:29,151 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 14:41:29,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:41:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 14:41:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 14:41:29,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:29,152 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 14:41:29,152 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:29,152 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-04 14:41:29,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:29,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:29,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:29,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:29,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:29,641 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 14:41:29,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:29,642 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 14:41:29,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:41:29,674 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:41:29,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:29,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:29,749 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 14:41:29,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:41:29,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 14:41:29,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:41:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:41:29,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:29,772 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 14:41:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:29,828 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 14:41:29,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:41:29,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 14:41:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:29,829 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:41:29,829 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:41:29,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 29 [2018-10-04 14:41:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:41:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:41:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:41:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:41:29,834 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 14:41:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:29,834 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:41:29,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:41:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:41:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:41:29,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:29,835 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 14:41:29,835 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:41:29,835 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-04 14:41:29,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:29,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:29,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:29,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:29,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:30,912 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 14:41:30,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:41:30,912 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 14:41:30,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown