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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:16:47,051 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:16:47,053 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:16:47,065 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:16:47,066 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:16:47,067 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:16:47,068 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:16:47,070 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:16:47,072 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:16:47,072 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:16:47,073 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 09:16:47,074 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 09:16:47,075 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 09:16:47,076 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 09:16:47,077 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 09:16:47,077 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 09:16:47,078 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 09:16:47,080 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 09:16:47,082 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 09:16:47,084 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 09:16:47,085 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 09:16:47,086 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 09:16:47,089 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 09:16:47,098 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 [2018-10-03 09:16:47,128 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:16:47,129 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:16:47,130 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:16:47,130 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:16:47,131 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:16:47,131 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:16:47,131 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:16:47,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:16:47,132 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:16:47,132 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:16:47,132 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:16:47,133 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:16:47,133 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:16:47,134 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:16:47,134 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:16:47,134 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:16:47,134 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:16:47,134 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:16:47,135 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:16:47,135 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:16:47,135 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:16:47,135 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:16:47,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:16:47,137 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:16:47,137 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:16:47,137 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:16:47,137 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:16:47,137 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:16:47,138 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:16:47,138 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:16:47,138 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:16:47,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:16:47,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:16:47,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:16:47,203 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:16:47,203 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:16:47,204 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-10-03 09:16:47,204 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-10-03 09:16:47,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:16:47,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:16:47,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:16:47,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:16:47,263 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:16:47,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,303 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 09:16:47,303 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 09:16:47,303 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 09:16:47,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:16:47,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:16:47,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:16:47,307 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:16:47,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/1) ... [2018-10-03 09:16:47,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:16:47,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:16:47,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:16:47,332 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:16:47,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (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 [2018-10-03 09:16:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-10-03 09:16:47,412 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-10-03 09:16:47,558 INFO L337 CfgBuilder]: Using library mode [2018-10-03 09:16:47,558 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:16:47 BoogieIcfgContainer [2018-10-03 09:16:47,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:16:47,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:16:47,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:16:47,563 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:16:47,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:47" (1/2) ... [2018-10-03 09:16:47,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ffee6e8 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:16:47, skipping insertion in model container [2018-10-03 09:16:47,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:16:47" (2/2) ... [2018-10-03 09:16:47,566 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-10-03 09:16:47,576 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:16:47,584 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:16:47,634 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:16:47,635 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:16:47,635 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:16:47,635 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:16:47,636 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:16:47,636 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:16:47,636 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:16:47,636 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:16:47,637 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:16:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-03 09:16:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-03 09:16:47,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:47,663 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-03 09:16:47,665 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:47,673 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:47,674 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-03 09:16:47,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:47,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:47,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:47,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:47,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:47,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:16:47,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-03 09:16:47,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:16:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:16:47,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:47,857 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-03 09:16:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:47,908 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 09:16:47,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:16:47,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-03 09:16:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:47,921 INFO L225 Difference]: With dead ends: 9 [2018-10-03 09:16:47,922 INFO L226 Difference]: Without dead ends: 4 [2018-10-03 09:16:47,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:16:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-03 09:16:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-03 09:16:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-03 09:16:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-03 09:16:47,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-03 09:16:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:47,960 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-03 09:16:47,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:16:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-03 09:16:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 09:16:47,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:47,961 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 09:16:47,961 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:47,961 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-03 09:16:47,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:47,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:47,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:48,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:48,031 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 [2018-10-03 09:16:48,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:48,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:48,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:48,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-03 09:16:48,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:16:48,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:16:48,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:48,206 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-10-03 09:16:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:48,281 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-03 09:16:48,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:16:48,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-10-03 09:16:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:48,283 INFO L225 Difference]: With dead ends: 6 [2018-10-03 09:16:48,283 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 09:16:48,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-03 09:16:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 09:16:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 09:16:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 09:16:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 09:16:48,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 09:16:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:48,292 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 09:16:48,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:16:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 09:16:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 09:16:48,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:48,293 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-03 09:16:48,294 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:48,295 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-03 09:16:48,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:48,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:48,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:48,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:48,386 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 [2018-10-03 09:16:48,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:48,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:48,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:48,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:48,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:48,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 09:16:48,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:16:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:16:48,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:48,470 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-03 09:16:48,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:48,506 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-03 09:16:48,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:16:48,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-03 09:16:48,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:48,507 INFO L225 Difference]: With dead ends: 7 [2018-10-03 09:16:48,507 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 09:16:48,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-03 09:16:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 09:16:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 09:16:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 09:16:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 09:16:48,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 09:16:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:48,511 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 09:16:48,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:16:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 09:16:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 09:16:48,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:48,512 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-03 09:16:48,512 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:48,512 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-03 09:16:48,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:48,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:48,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:48,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:48,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:48,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:48,614 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 [2018-10-03 09:16:48,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:48,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 09:16:48,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:48,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:48,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:48,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 09:16:48,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:16:48,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:16:48,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:48,728 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-03 09:16:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:48,801 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 09:16:48,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:16:48,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-03 09:16:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:48,802 INFO L225 Difference]: With dead ends: 8 [2018-10-03 09:16:48,802 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:16:48,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-03 09:16:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:16:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 09:16:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 09:16:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 09:16:48,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 09:16:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:48,805 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 09:16:48,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:16:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 09:16:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:16:48,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:48,806 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-03 09:16:48,807 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:48,807 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-03 09:16:48,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:48,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:48,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:48,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:48,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:49,090 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 [2018-10-03 09:16:49,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:49,103 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:49,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:49,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:49,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 09:16:49,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:16:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:16:49,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:49,157 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-03 09:16:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:49,225 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 09:16:49,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 09:16:49,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-03 09:16:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:49,227 INFO L225 Difference]: With dead ends: 9 [2018-10-03 09:16:49,228 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 09:16:49,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-03 09:16:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 09:16:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 09:16:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 09:16:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 09:16:49,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 09:16:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:49,232 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 09:16:49,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:16:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 09:16:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 09:16:49,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:49,233 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-03 09:16:49,233 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:49,234 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:49,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-03 09:16:49,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:49,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:49,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:49,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:49,443 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 [2018-10-03 09:16:49,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:49,482 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 09:16:49,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:49,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:49,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:16:49,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:16:49,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:16:49,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:49,560 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-03 09:16:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:49,624 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 09:16:49,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:16:49,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-03 09:16:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:49,625 INFO L225 Difference]: With dead ends: 10 [2018-10-03 09:16:49,625 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 09:16:49,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-03 09:16:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 09:16:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 09:16:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 09:16:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 09:16:49,630 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 09:16:49,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:49,630 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 09:16:49,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:16:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 09:16:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:16:49,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:49,631 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-03 09:16:49,631 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:49,631 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-03 09:16:49,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:49,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:49,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:49,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:49,809 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 [2018-10-03 09:16:49,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:49,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 09:16:49,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:49,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:49,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 09:16:49,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:16:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:16:49,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:49,897 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-03 09:16:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:50,383 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 09:16:50,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:16:50,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-03 09:16:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:50,384 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:16:50,384 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 09:16:50,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-03 09:16:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 09:16:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 09:16:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 09:16:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 09:16:50,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 09:16:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:50,389 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 09:16:50,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:16:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 09:16:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 09:16:50,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:50,390 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-03 09:16:50,390 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:50,390 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-03 09:16:50,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:50,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:50,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:50,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:50,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:50,554 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 [2018-10-03 09:16:50,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:50,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:50,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:50,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 09:16:50,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:16:50,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:16:50,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:50,625 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-03 09:16:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:50,724 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 09:16:50,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:16:50,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-03 09:16:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:50,725 INFO L225 Difference]: With dead ends: 12 [2018-10-03 09:16:50,726 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:16:50,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-03 09:16:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:16:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 09:16:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:16:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 09:16:50,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 09:16:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:50,730 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 09:16:50,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:16:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 09:16:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 09:16:50,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:50,730 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-03 09:16:50,731 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:50,731 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:50,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-03 09:16:50,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:50,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:50,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:50,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:50,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:50,871 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 [2018-10-03 09:16:50,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:50,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:50,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:50,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:50,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:50,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:16:50,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:16:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:16:50,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:50,952 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-03 09:16:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:51,089 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 09:16:51,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:16:51,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-03 09:16:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:51,092 INFO L225 Difference]: With dead ends: 13 [2018-10-03 09:16:51,092 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 09:16:51,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-03 09:16:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 09:16:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 09:16:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 09:16:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 09:16:51,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 09:16:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:51,105 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 09:16:51,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:16:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 09:16:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 09:16:51,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:51,105 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-03 09:16:51,106 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:51,106 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:51,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-03 09:16:51,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:51,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:51,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:51,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:51,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:51,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:51,380 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 [2018-10-03 09:16:51,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:51,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 09:16:51,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:51,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:51,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:51,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 09:16:51,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:16:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:16:51,519 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:51,519 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-03 09:16:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:51,644 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 09:16:51,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:16:51,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-03 09:16:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:51,646 INFO L225 Difference]: With dead ends: 14 [2018-10-03 09:16:51,646 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:16:51,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 10 [2018-10-03 09:16:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:16:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 09:16:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 09:16:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 09:16:51,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 09:16:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:51,652 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 09:16:51,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:16:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 09:16:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 09:16:51,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:51,652 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-03 09:16:51,653 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:51,653 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-03 09:16:51,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:51,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:51,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:51,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:51,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:51,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:51,818 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 [2018-10-03 09:16:51,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:51,842 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:51,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:51,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:51,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:51,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 09:16:51,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 09:16:51,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 09:16:51,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:51,910 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-03 09:16:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:52,128 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 09:16:52,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:16:52,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-03 09:16:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:52,129 INFO L225 Difference]: With dead ends: 15 [2018-10-03 09:16:52,130 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 09:16:52,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 11 [2018-10-03 09:16:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 09:16:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 09:16:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 09:16:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 09:16:52,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 09:16:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:52,134 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 09:16:52,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 09:16:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 09:16:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 09:16:52,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:52,135 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-03 09:16:52,135 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:52,136 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-03 09:16:52,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:52,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:52,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:52,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:52,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:52,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:52,496 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 [2018-10-03 09:16:52,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:52,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 09:16:52,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:52,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:52,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:52,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 09:16:52,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:16:52,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:16:52,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:52,589 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-03 09:16:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:52,712 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 09:16:52,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:16:52,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-03 09:16:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:52,714 INFO L225 Difference]: With dead ends: 16 [2018-10-03 09:16:52,714 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 09:16:52,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 12 [2018-10-03 09:16:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 09:16:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 09:16:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 09:16:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 09:16:52,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 09:16:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:52,719 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 09:16:52,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:16:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 09:16:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 09:16:52,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:52,720 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-03 09:16:52,720 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:52,721 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-03 09:16:52,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:52,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:52,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:52,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:52,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:53,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:53,023 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 [2018-10-03 09:16:53,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:53,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 09:16:53,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:53,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:53,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:53,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 09:16:53,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:16:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:16:53,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:53,116 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-03 09:16:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:53,354 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 09:16:53,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:16:53,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-03 09:16:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:53,356 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:16:53,356 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 09:16:53,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 13 [2018-10-03 09:16:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 09:16:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 09:16:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 09:16:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 09:16:53,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 09:16:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:53,361 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 09:16:53,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:16:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 09:16:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 09:16:53,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:53,362 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-03 09:16:53,363 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:53,363 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-03 09:16:53,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:53,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:53,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:53,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:53,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:53,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:53,636 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 [2018-10-03 09:16:53,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:53,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:53,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:53,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 09:16:53,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:16:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:16:53,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:53,723 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-03 09:16:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:53,995 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 09:16:53,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:16:53,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-03 09:16:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:53,996 INFO L225 Difference]: With dead ends: 18 [2018-10-03 09:16:53,996 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 09:16:53,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-03 09:16:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 09:16:54,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 09:16:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 09:16:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 09:16:54,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 09:16:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:54,002 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 09:16:54,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:16:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 09:16:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 09:16:54,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:54,003 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-03 09:16:54,003 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:54,004 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-03 09:16:54,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:54,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:54,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:54,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:54,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:54,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:54,243 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 [2018-10-03 09:16:54,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:54,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:54,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:54,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:54,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:54,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:16:54,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:16:54,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:16:54,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:54,387 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-03 09:16:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:54,581 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 09:16:54,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:16:54,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-03 09:16:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:54,583 INFO L225 Difference]: With dead ends: 19 [2018-10-03 09:16:54,583 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 09:16:54,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-03 09:16:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 09:16:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 09:16:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 09:16:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 09:16:54,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 09:16:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:54,589 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 09:16:54,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:16:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 09:16:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 09:16:54,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:54,590 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-03 09:16:54,590 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:54,590 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:54,590 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-03 09:16:54,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:54,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:54,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:54,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:54,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:55,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:55,143 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 [2018-10-03 09:16:55,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:55,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 09:16:55,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:55,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:55,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:55,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 09:16:55,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:16:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:16:55,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:55,294 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-03 09:16:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:55,545 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 09:16:55,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:16:55,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-03 09:16:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:55,546 INFO L225 Difference]: With dead ends: 20 [2018-10-03 09:16:55,546 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:16:55,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 16 [2018-10-03 09:16:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:16:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 09:16:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:16:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 09:16:55,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 09:16:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:55,551 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 09:16:55,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:16:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 09:16:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 09:16:55,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:55,552 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-03 09:16:55,553 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:55,553 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-03 09:16:55,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:55,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:55,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:55,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:55,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:55,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:55,963 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 [2018-10-03 09:16:55,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:55,977 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:55,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:55,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:56,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:56,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 09:16:56,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:16:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:16:56,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:56,046 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-03 09:16:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:56,298 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 09:16:56,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:16:56,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-03 09:16:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:56,299 INFO L225 Difference]: With dead ends: 21 [2018-10-03 09:16:56,299 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 09:16:56,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-03 09:16:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 09:16:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 09:16:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 09:16:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 09:16:56,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 09:16:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:56,304 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 09:16:56,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:16:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 09:16:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 09:16:56,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:56,305 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-03 09:16:56,305 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:56,306 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-03 09:16:56,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:56,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:56,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:56,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:56,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:57,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:57,243 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 [2018-10-03 09:16:57,250 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:57,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 09:16:57,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:57,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:57,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:57,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 09:16:57,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:16:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:16:57,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:57,648 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-03 09:16:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:57,940 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 09:16:57,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:16:57,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-03 09:16:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:57,941 INFO L225 Difference]: With dead ends: 22 [2018-10-03 09:16:57,941 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 09:16:57,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 18 [2018-10-03 09:16:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 09:16:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 09:16:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 09:16:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 09:16:57,946 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 09:16:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:57,946 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 09:16:57,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:16:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 09:16:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:16:57,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:57,947 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-03 09:16:57,947 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:57,947 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-03 09:16:57,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:57,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:57,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:57,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:57,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:58,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:58,342 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 [2018-10-03 09:16:58,352 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:58,362 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 09:16:58,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:58,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:58,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:58,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 09:16:58,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 09:16:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 09:16:58,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:58,431 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-03 09:16:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:58,779 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 09:16:58,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 09:16:58,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-03 09:16:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:58,781 INFO L225 Difference]: With dead ends: 23 [2018-10-03 09:16:58,781 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 09:16:58,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-03 09:16:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 09:16:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 09:16:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 09:16:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 09:16:58,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 09:16:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:58,786 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 09:16:58,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 09:16:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 09:16:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 09:16:58,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:58,787 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-03 09:16:58,787 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:58,787 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-03 09:16:58,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:58,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:58,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:58,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:58,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:59,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:59,286 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 [2018-10-03 09:16:59,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:59,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:59,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:59,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 09:16:59,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:16:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:16:59,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:59,414 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-03 09:16:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:59,756 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 09:16:59,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 09:16:59,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-03 09:16:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:59,757 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:16:59,758 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:16:59,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 20 [2018-10-03 09:16:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:16:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 09:16:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 09:16:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 09:16:59,762 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 09:16:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:59,762 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 09:16:59,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:16:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 09:16:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 09:16:59,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:59,763 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-03 09:16:59,764 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:59,764 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:59,764 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-03 09:16:59,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:59,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:59,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:59,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:59,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:00,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:00,358 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 [2018-10-03 09:17:00,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:00,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:00,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:00,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:00,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:00,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 09:17:00,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:17:00,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:17:00,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:00,476 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-03 09:17:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:00,806 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 09:17:00,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:17:00,807 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-03 09:17:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:00,808 INFO L225 Difference]: With dead ends: 25 [2018-10-03 09:17:00,808 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 09:17:00,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 21 [2018-10-03 09:17:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 09:17:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 09:17:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 09:17:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 09:17:00,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 09:17:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:00,813 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 09:17:00,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:17:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 09:17:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 09:17:00,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:00,814 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-03 09:17:00,815 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:00,815 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-03 09:17:00,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:00,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:00,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:00,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:00,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:01,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:01,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:17:01,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:01,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 09:17:01,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:01,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:01,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:01,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 09:17:01,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:17:01,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:17:01,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:01,428 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-03 09:17:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:01,880 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 09:17:01,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 09:17:01,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-03 09:17:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:01,883 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:17:01,884 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 09:17:01,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 22 [2018-10-03 09:17:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 09:17:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 09:17:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:17:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 09:17:01,888 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 09:17:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:01,888 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 09:17:01,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:17:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 09:17:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 09:17:01,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:01,889 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-03 09:17:01,889 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:01,890 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:01,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-03 09:17:01,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:01,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:01,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:01,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:01,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:02,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:02,547 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 [2018-10-03 09:17:02,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:02,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:02,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:02,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:02,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:02,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 09:17:02,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 09:17:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 09:17:02,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:02,648 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-03 09:17:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:03,050 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 09:17:03,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:17:03,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-03 09:17:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:03,056 INFO L225 Difference]: With dead ends: 27 [2018-10-03 09:17:03,056 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 09:17:03,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 23 [2018-10-03 09:17:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 09:17:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 09:17:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 09:17:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 09:17:03,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 09:17:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:03,060 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 09:17:03,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 09:17:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 09:17:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 09:17:03,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:03,061 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-03 09:17:03,061 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:03,061 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-03 09:17:03,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:03,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:03,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:03,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:03,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:03,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:03,516 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 [2018-10-03 09:17:03,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:03,535 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 09:17:03,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:03,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:03,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:03,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 09:17:03,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:17:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:17:03,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:03,605 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-03 09:17:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:04,381 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 09:17:04,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:17:04,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-03 09:17:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:04,382 INFO L225 Difference]: With dead ends: 28 [2018-10-03 09:17:04,382 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:17:04,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 24 [2018-10-03 09:17:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:17:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 09:17:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 09:17:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 09:17:04,387 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 09:17:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 09:17:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:17:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 09:17:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:17:04,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:04,388 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-03 09:17:04,388 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:04,388 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-03 09:17:04,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:04,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:04,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:04,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:04,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:04,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:04,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:17:04,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:04,920 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 09:17:04,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:04,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:05,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:05,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 09:17:05,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 09:17:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 09:17:05,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:05,010 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-03 09:17:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:05,480 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 09:17:05,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 09:17:05,481 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-03 09:17:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:05,482 INFO L225 Difference]: With dead ends: 29 [2018-10-03 09:17:05,482 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 09:17:05,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 25 [2018-10-03 09:17:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 09:17:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 09:17:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 09:17:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 09:17:05,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 09:17:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:05,487 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 09:17:05,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 09:17:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 09:17:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 09:17:05,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:05,488 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-03 09:17:05,488 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:05,488 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:05,488 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-03 09:17:05,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:05,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:05,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:05,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:05,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:06,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:06,042 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 [2018-10-03 09:17:06,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:06,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:06,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:06,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 09:17:06,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 09:17:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 09:17:06,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:06,153 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-03 09:17:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:06,595 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 09:17:06,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:17:06,596 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-03 09:17:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:06,597 INFO L225 Difference]: With dead ends: 30 [2018-10-03 09:17:06,597 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 09:17:06,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 26 [2018-10-03 09:17:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 09:17:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 09:17:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 09:17:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 09:17:06,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 09:17:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:06,602 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 09:17:06,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 09:17:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 09:17:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 09:17:06,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:06,603 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-03 09:17:06,604 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:06,604 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-03 09:17:06,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:06,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:06,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:07,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:07,192 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 [2018-10-03 09:17:07,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:07,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:07,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:07,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:07,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:07,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 09:17:07,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:17:07,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:17:07,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:07,330 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-03 09:17:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:07,940 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 09:17:07,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:17:07,941 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-03 09:17:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:07,941 INFO L225 Difference]: With dead ends: 31 [2018-10-03 09:17:07,942 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 09:17:07,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 27 [2018-10-03 09:17:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 09:17:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 09:17:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 09:17:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 09:17:07,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 09:17:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:07,947 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 09:17:07,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:17:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 09:17:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 09:17:07,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:07,947 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-03 09:17:07,948 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:07,948 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-03 09:17:07,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:07,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:07,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:07,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:07,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:08,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:08,516 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) [2018-10-03 09:17:08,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:08,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 09:17:08,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:08,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:08,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:08,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 09:17:08,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 09:17:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 09:17:08,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:08,656 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-03 09:17:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:09,168 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 09:17:09,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 09:17:09,168 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-03 09:17:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:09,169 INFO L225 Difference]: With dead ends: 32 [2018-10-03 09:17:09,169 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:17:09,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 28 [2018-10-03 09:17:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:17:09,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 09:17:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:17:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 09:17:09,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 09:17:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:09,174 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 09:17:09,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 09:17:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 09:17:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 09:17:09,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:09,175 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-03 09:17:09,175 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:09,175 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-03 09:17:09,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:09,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:09,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:09,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:09,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:10,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:10,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:17:10,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:10,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:10,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:10,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:10,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:10,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 09:17:10,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:17:10,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:17:10,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:10,736 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-03 09:17:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:11,284 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 09:17:11,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:17:11,284 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-03 09:17:11,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:11,285 INFO L225 Difference]: With dead ends: 33 [2018-10-03 09:17:11,285 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 09:17:11,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 29 [2018-10-03 09:17:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 09:17:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 09:17:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 09:17:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 09:17:11,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 09:17:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:11,292 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 09:17:11,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:17:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 09:17:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 09:17:11,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:11,293 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-03 09:17:11,293 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:11,293 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-03 09:17:11,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:11,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:11,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:11,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:11,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:11,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:11,925 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 [2018-10-03 09:17:11,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:11,950 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 09:17:11,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:11,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:12,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:12,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 09:17:12,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:17:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:17:12,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:12,042 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-03 09:17:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:12,755 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 09:17:12,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:17:12,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-03 09:17:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:12,756 INFO L225 Difference]: With dead ends: 34 [2018-10-03 09:17:12,756 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 09:17:12,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 30 [2018-10-03 09:17:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 09:17:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 09:17:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 09:17:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 09:17:12,762 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 09:17:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:12,762 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 09:17:12,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:17:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 09:17:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 09:17:12,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:12,763 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-03 09:17:12,763 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:12,763 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-03 09:17:12,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:12,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:12,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:12,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:12,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:13,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:13,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:13,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:13,483 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 09:17:13,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:13,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:13,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:13,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 09:17:13,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 09:17:13,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 09:17:13,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:13,650 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-03 09:17:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:14,350 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 09:17:14,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 09:17:14,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-03 09:17:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:14,351 INFO L225 Difference]: With dead ends: 35 [2018-10-03 09:17:14,351 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 09:17:14,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 31 [2018-10-03 09:17:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 09:17:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 09:17:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 09:17:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 09:17:14,356 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 09:17:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:14,357 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 09:17:14,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 09:17:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 09:17:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 09:17:14,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:14,357 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-03 09:17:14,358 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:14,358 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-03 09:17:14,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:14,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:14,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:14,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:14,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:15,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:15,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:15,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:15,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:15,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:15,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 09:17:15,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 09:17:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 09:17:15,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:15,262 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-03 09:17:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:15,923 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 09:17:15,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 09:17:15,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-03 09:17:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:15,924 INFO L225 Difference]: With dead ends: 36 [2018-10-03 09:17:15,924 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 09:17:15,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 32 [2018-10-03 09:17:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 09:17:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 09:17:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 09:17:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 09:17:15,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 09:17:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:15,930 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 09:17:15,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 09:17:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 09:17:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 09:17:15,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:15,931 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-03 09:17:15,931 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:15,931 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:15,931 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-03 09:17:15,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:15,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:15,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:15,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:15,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:16,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:16,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:16,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:16,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:16,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:16,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:17,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:17,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 09:17:17,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:17:17,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:17:17,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:17,034 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-03 09:17:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:17,948 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 09:17:17,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:17:17,949 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-03 09:17:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:17,950 INFO L225 Difference]: With dead ends: 37 [2018-10-03 09:17:17,950 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 09:17:17,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 33 [2018-10-03 09:17:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 09:17:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 09:17:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 09:17:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 09:17:17,957 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 09:17:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:17,957 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 09:17:17,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:17:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 09:17:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 09:17:17,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:17,958 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-03 09:17:17,958 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:17,958 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-03 09:17:17,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:17,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:17,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:17,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:17,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:19,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:19,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:19,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:19,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 09:17:19,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:19,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:19,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:19,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 09:17:19,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 09:17:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 09:17:19,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:19,364 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-03 09:17:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:20,106 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 09:17:20,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:17:20,106 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-03 09:17:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:20,107 INFO L225 Difference]: With dead ends: 38 [2018-10-03 09:17:20,107 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 09:17:20,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 34 [2018-10-03 09:17:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 09:17:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 09:17:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 09:17:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 09:17:20,111 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 09:17:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:20,112 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 09:17:20,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 09:17:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 09:17:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 09:17:20,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:20,112 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-03 09:17:20,113 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:20,113 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:20,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-03 09:17:20,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:20,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:20,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:20,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:20,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:20,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:20,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:20,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:20,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:20,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:20,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:21,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:21,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 09:17:21,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 09:17:21,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 09:17:21,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:21,178 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-03 09:17:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:21,989 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 09:17:21,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 09:17:21,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-03 09:17:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:21,990 INFO L225 Difference]: With dead ends: 39 [2018-10-03 09:17:21,991 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 09:17:21,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 35 [2018-10-03 09:17:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 09:17:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 09:17:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 09:17:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 09:17:21,995 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 09:17:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:21,995 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 09:17:21,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 09:17:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 09:17:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 09:17:21,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:21,996 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-03 09:17:21,996 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:21,996 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-03 09:17:21,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:21,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:21,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:21,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:21,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:23,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:23,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:23,123 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:23,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 09:17:23,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:23,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:23,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:23,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 09:17:23,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:17:23,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:17:23,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:23,241 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-03 09:17:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:24,069 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 09:17:24,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 09:17:24,069 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-03 09:17:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:24,070 INFO L225 Difference]: With dead ends: 40 [2018-10-03 09:17:24,070 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 09:17:24,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 36 [2018-10-03 09:17:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 09:17:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 09:17:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 09:17:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 09:17:24,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 09:17:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:24,075 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 09:17:24,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:17:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 09:17:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 09:17:24,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:24,076 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-03 09:17:24,076 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:24,076 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:24,076 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-03 09:17:24,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:24,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:24,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:24,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:24,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:24,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:24,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:24,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:24,975 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 09:17:24,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:24,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:25,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:25,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 09:17:25,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 09:17:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 09:17:25,080 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:25,080 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-03 09:17:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:25,955 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 09:17:25,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 09:17:25,955 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-03 09:17:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:25,956 INFO L225 Difference]: With dead ends: 41 [2018-10-03 09:17:25,956 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 09:17:25,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 37 [2018-10-03 09:17:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 09:17:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 09:17:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 09:17:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 09:17:25,960 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 09:17:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:25,960 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 09:17:25,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 09:17:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 09:17:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 09:17:25,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:25,961 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-03 09:17:25,961 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:25,962 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-03 09:17:25,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:25,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:25,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:25,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:25,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:27,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:27,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:27,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:27,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:27,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:27,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 09:17:27,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 09:17:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 09:17:27,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:27,547 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-03 09:17:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:28,608 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 09:17:28,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 09:17:28,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-03 09:17:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:28,609 INFO L225 Difference]: With dead ends: 42 [2018-10-03 09:17:28,609 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 09:17:28,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 38 [2018-10-03 09:17:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 09:17:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 09:17:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 09:17:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 09:17:28,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 09:17:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:28,613 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 09:17:28,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 09:17:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 09:17:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 09:17:28,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:28,613 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-03 09:17:28,614 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:28,614 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-03 09:17:28,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:28,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:28,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:28,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:28,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:30,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:30,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:30,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:30,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:30,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:30,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:30,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:30,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 09:17:30,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:17:30,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:17:30,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:30,419 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-03 09:17:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:31,495 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 09:17:31,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:17:31,495 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-03 09:17:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:31,496 INFO L225 Difference]: With dead ends: 43 [2018-10-03 09:17:31,496 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 09:17:31,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 39 [2018-10-03 09:17:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 09:17:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 09:17:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 09:17:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 09:17:31,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 09:17:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:31,500 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 09:17:31,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:17:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 09:17:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 09:17:31,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:31,501 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-03 09:17:31,501 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:31,501 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-03 09:17:31,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:31,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:31,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:31,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:31,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:32,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:32,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:32,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:32,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 09:17:32,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:32,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:32,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:32,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 09:17:32,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 09:17:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 09:17:32,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:32,759 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-03 09:17:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:33,950 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 09:17:33,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 09:17:33,951 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-03 09:17:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:33,951 INFO L225 Difference]: With dead ends: 44 [2018-10-03 09:17:33,951 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:17:33,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 40 [2018-10-03 09:17:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:17:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 09:17:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 09:17:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 09:17:33,955 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 09:17:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:33,955 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 09:17:33,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 09:17:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 09:17:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 09:17:33,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:33,956 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-03 09:17:33,956 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:33,956 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:33,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-03 09:17:33,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:33,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:33,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:33,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:33,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:35,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:35,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:35,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:35,062 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:35,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:35,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:35,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:35,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 09:17:35,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 09:17:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 09:17:35,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:35,158 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-03 09:17:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:36,289 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 09:17:36,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 09:17:36,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-03 09:17:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:36,290 INFO L225 Difference]: With dead ends: 45 [2018-10-03 09:17:36,290 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 09:17:36,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 41 [2018-10-03 09:17:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 09:17:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 09:17:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 09:17:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 09:17:36,294 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 09:17:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:36,294 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 09:17:36,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 09:17:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 09:17:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 09:17:36,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:36,295 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-03 09:17:36,296 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:36,296 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-03 09:17:36,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:36,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:36,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:36,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:37,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:37,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:37,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 09:17:37,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:37,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:37,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:37,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 09:17:37,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:17:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:17:37,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:37,582 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-03 09:17:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:38,898 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 09:17:38,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:17:38,899 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-03 09:17:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:38,900 INFO L225 Difference]: With dead ends: 46 [2018-10-03 09:17:38,900 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 09:17:38,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 42 [2018-10-03 09:17:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 09:17:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 09:17:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 09:17:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 09:17:38,904 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 09:17:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:38,904 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 09:17:38,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:17:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 09:17:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:17:38,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:38,905 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-03 09:17:38,905 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:38,905 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-03 09:17:38,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:38,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:38,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:38,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:40,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:40,350 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:40,370 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 09:17:40,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:40,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:40,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 09:17:40,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 09:17:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 09:17:40,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:40,501 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-03 09:17:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:41,671 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 09:17:41,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 09:17:41,672 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-03 09:17:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:41,672 INFO L225 Difference]: With dead ends: 47 [2018-10-03 09:17:41,673 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 09:17:41,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 43 [2018-10-03 09:17:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 09:17:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 09:17:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 09:17:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 09:17:41,677 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 09:17:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:41,677 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 09:17:41,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 09:17:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 09:17:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 09:17:41,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:41,678 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-03 09:17:41,678 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:41,678 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-03 09:17:41,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:41,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:41,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:41,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:43,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:43,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:43,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:43,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:43,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:43,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 09:17:43,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 09:17:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 09:17:43,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:43,419 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-03 09:17:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:44,656 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 09:17:44,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 09:17:44,656 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-03 09:17:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:44,657 INFO L225 Difference]: With dead ends: 48 [2018-10-03 09:17:44,657 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 09:17:44,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 44 [2018-10-03 09:17:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 09:17:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 09:17:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 09:17:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 09:17:44,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 09:17:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:44,661 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 09:17:44,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 09:17:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 09:17:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 09:17:44,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:44,662 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-03 09:17:44,662 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:44,662 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-03 09:17:44,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:44,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:44,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:44,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:44,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:46,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:46,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:46,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:46,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:46,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:46,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 09:17:46,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:17:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:17:46,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:46,147 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-03 09:17:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:47,428 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 09:17:47,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:17:47,429 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-03 09:17:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:47,430 INFO L225 Difference]: With dead ends: 49 [2018-10-03 09:17:47,430 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 09:17:47,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 45 [2018-10-03 09:17:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 09:17:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 09:17:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 09:17:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 09:17:47,434 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 09:17:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:47,434 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 09:17:47,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:17:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 09:17:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 09:17:47,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:47,435 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-03 09:17:47,435 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:47,435 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-03 09:17:47,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:47,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:47,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:47,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:48,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:48,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:49,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:49,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 09:17:49,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:49,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:49,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:49,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 09:17:49,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 09:17:49,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 09:17:49,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:49,153 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-03 09:17:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:50,494 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 09:17:50,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:17:50,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-03 09:17:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:50,496 INFO L225 Difference]: With dead ends: 50 [2018-10-03 09:17:50,496 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 09:17:50,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 46 [2018-10-03 09:17:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 09:17:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 09:17:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 09:17:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 09:17:50,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 09:17:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:50,501 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 09:17:50,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 09:17:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 09:17:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 09:17:50,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:50,502 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-03 09:17:50,502 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:50,502 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-03 09:17:50,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:50,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:50,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:50,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:51,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:51,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:51,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:51,952 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:51,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:51,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:52,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:52,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 09:17:52,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 09:17:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 09:17:52,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:52,074 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-03 09:17:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:53,620 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 09:17:53,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 09:17:53,620 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-03 09:17:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:53,621 INFO L225 Difference]: With dead ends: 51 [2018-10-03 09:17:53,621 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 09:17:53,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.2s impTime 47 [2018-10-03 09:17:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 09:17:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 09:17:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 09:17:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 09:17:53,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 09:17:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:53,625 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 09:17:53,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 09:17:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 09:17:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 09:17:53,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:53,626 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-03 09:17:53,626 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:53,626 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-03 09:17:53,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:53,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:53,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:53,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:53,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:55,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:55,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:55,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:55,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 09:17:55,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:55,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:55,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:55,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 09:17:55,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:17:55,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:17:55,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:55,280 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-03 09:17:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:56,741 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 09:17:56,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:17:56,742 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-03 09:17:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:56,742 INFO L225 Difference]: With dead ends: 52 [2018-10-03 09:17:56,743 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 09:17:56,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime 48 [2018-10-03 09:17:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 09:17:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 09:17:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 09:17:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 09:17:56,746 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 09:17:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:56,746 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 09:17:56,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:17:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 09:17:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 09:17:56,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:56,747 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-03 09:17:56,747 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:56,747 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-03 09:17:56,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:56,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:56,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:56,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:56,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:58,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:58,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:58,555 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:58,577 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 09:17:58,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:58,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:58,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:58,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 09:17:58,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 09:17:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 09:17:58,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:58,762 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-03 09:18:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:00,297 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 09:18:00,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 09:18:00,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-03 09:18:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:00,298 INFO L225 Difference]: With dead ends: 53 [2018-10-03 09:18:00,298 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 09:18:00,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 49 [2018-10-03 09:18:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 09:18:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 09:18:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 09:18:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 09:18:00,303 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 09:18:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:00,304 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 09:18:00,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 09:18:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 09:18:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 09:18:00,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:00,304 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-03 09:18:00,305 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:00,305 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-03 09:18:00,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:00,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:00,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:00,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:00,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:01,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:01,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:01,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:01,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:01,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:01,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 09:18:01,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 09:18:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 09:18:01,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:01,995 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-03 09:18:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:03,616 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 09:18:03,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 09:18:03,616 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-03 09:18:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:03,616 INFO L225 Difference]: With dead ends: 54 [2018-10-03 09:18:03,617 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 09:18:03,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime 50 [2018-10-03 09:18:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 09:18:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 09:18:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 09:18:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 09:18:03,620 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 09:18:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:03,620 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 09:18:03,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 09:18:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 09:18:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 09:18:03,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:03,620 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-03 09:18:03,620 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:03,621 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-03 09:18:03,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:03,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:03,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:03,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:03,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:06,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:06,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:06,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:06,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:06,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:06,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:07,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:07,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 09:18:07,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:18:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:18:07,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:07,078 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-03 09:18:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:08,787 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 09:18:08,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:18:08,787 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-03 09:18:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:08,788 INFO L225 Difference]: With dead ends: 55 [2018-10-03 09:18:08,788 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 09:18:08,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime 51 [2018-10-03 09:18:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 09:18:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 09:18:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 09:18:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 09:18:08,791 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 09:18:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:08,791 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 09:18:08,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:18:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 09:18:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 09:18:08,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:08,791 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-03 09:18:08,792 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:08,792 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-03 09:18:08,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:08,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:08,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:08,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:08,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:10,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:10,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:10,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:10,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 09:18:10,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:10,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:10,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:10,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 09:18:10,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 09:18:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 09:18:10,816 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:10,816 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-03 09:18:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:12,577 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 09:18:12,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:18:12,577 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-03 09:18:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:12,578 INFO L225 Difference]: With dead ends: 56 [2018-10-03 09:18:12,578 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 09:18:12,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 52 [2018-10-03 09:18:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 09:18:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 09:18:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 09:18:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 09:18:12,582 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 09:18:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:12,582 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 09:18:12,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 09:18:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 09:18:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 09:18:12,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:12,583 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-03 09:18:12,583 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:12,583 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:12,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-03 09:18:12,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:12,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:12,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:12,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:12,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:14,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:14,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:14,562 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:14,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:14,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:14,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:14,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:14,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 09:18:14,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:18:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:18:14,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:14,725 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-03 09:18:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:16,495 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 09:18:16,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:18:16,495 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-03 09:18:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:16,496 INFO L225 Difference]: With dead ends: 57 [2018-10-03 09:18:16,496 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 09:18:16,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 53 [2018-10-03 09:18:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 09:18:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 09:18:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 09:18:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 09:18:16,501 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 09:18:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:16,501 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 09:18:16,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:18:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 09:18:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 09:18:16,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:16,502 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-03 09:18:16,502 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:16,502 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-03 09:18:16,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:16,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:16,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:16,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:16,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:18,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:18,408 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:18,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 09:18:18,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:18,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:18,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:18:18,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:18:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:18:18,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:18,564 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-03 09:18:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:20,594 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 09:18:20,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:18:20,594 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-03 09:18:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:20,595 INFO L225 Difference]: With dead ends: 58 [2018-10-03 09:18:20,595 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 09:18:20,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 54 [2018-10-03 09:18:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 09:18:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 09:18:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 09:18:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 09:18:20,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 09:18:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:20,600 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 09:18:20,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:18:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 09:18:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 09:18:20,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:20,601 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-03 09:18:20,601 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:20,601 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-03 09:18:20,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:20,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:20,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:20,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:20,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:22,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:22,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:22,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:22,515 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 09:18:22,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:22,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:22,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:22,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:18:22,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:18:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:18:22,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:22,651 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-03 09:18:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:24,716 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 09:18:24,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:18:24,716 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-03 09:18:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:24,717 INFO L225 Difference]: With dead ends: 59 [2018-10-03 09:18:24,717 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 09:18:24,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.7s impTime 55 [2018-10-03 09:18:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 09:18:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 09:18:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 09:18:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 09:18:24,722 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 09:18:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:24,722 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 09:18:24,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:18:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 09:18:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 09:18:24,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:24,722 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-03 09:18:24,722 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:24,723 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-03 09:18:24,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:24,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:24,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:24,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:24,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:27,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:27,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:27,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:27,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:27,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:27,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 09:18:27,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:18:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:18:27,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:27,382 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-03 09:18:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:29,503 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 09:18:29,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:18:29,503 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-03 09:18:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:29,504 INFO L225 Difference]: With dead ends: 60 [2018-10-03 09:18:29,504 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 09:18:29,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 56 [2018-10-03 09:18:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 09:18:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 09:18:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 09:18:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 09:18:29,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 09:18:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:29,507 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 09:18:29,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:18:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 09:18:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 09:18:29,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:29,507 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-03 09:18:29,508 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:29,508 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:29,508 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-03 09:18:29,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:29,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:29,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:29,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:29,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:31,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:31,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:31,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:31,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:31,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:31,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:31,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:31,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:18:31,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:18:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:18:31,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:31,871 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-03 09:18:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:33,917 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 09:18:33,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:18:33,918 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-03 09:18:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:33,919 INFO L225 Difference]: With dead ends: 61 [2018-10-03 09:18:33,919 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 09:18:33,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime 57 [2018-10-03 09:18:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 09:18:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 09:18:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 09:18:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 09:18:33,923 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 09:18:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:33,923 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 09:18:33,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:18:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 09:18:33,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 09:18:33,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:33,924 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-03 09:18:33,924 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:33,924 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-03 09:18:33,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:33,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:33,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:33,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:33,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:36,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:36,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:36,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:36,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 09:18:36,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:36,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:36,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:36,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 09:18:36,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 09:18:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 09:18:36,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:36,703 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-03 09:18:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:38,949 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 09:18:38,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 09:18:38,950 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-03 09:18:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:38,951 INFO L225 Difference]: With dead ends: 62 [2018-10-03 09:18:38,951 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:18:38,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 58 [2018-10-03 09:18:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:18:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 09:18:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 09:18:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 09:18:38,956 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 09:18:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:38,956 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 09:18:38,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 09:18:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 09:18:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 09:18:38,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:38,957 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-03 09:18:38,957 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:38,957 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-03 09:18:38,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:38,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:38,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:38,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:38,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:41,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:41,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:41,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:41,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:41,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:41,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:41,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:41,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 09:18:41,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 09:18:41,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 09:18:41,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:41,780 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-03 09:18:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:43,973 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 09:18:43,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 09:18:43,974 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-03 09:18:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:43,975 INFO L225 Difference]: With dead ends: 63 [2018-10-03 09:18:43,975 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 09:18:43,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 59 [2018-10-03 09:18:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 09:18:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 09:18:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 09:18:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 09:18:43,980 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 09:18:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:43,980 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 09:18:43,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 09:18:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 09:18:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 09:18:43,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:43,981 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-03 09:18:43,981 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:43,981 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-03 09:18:43,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:43,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:43,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:43,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:43,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:46,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:46,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:46,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:46,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 09:18:46,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:46,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:46,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:46,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 09:18:46,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:18:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:18:46,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:46,708 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-03 09:18:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:48,968 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 09:18:48,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:18:48,969 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-03 09:18:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:48,969 INFO L225 Difference]: With dead ends: 64 [2018-10-03 09:18:48,970 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 09:18:48,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime 60 [2018-10-03 09:18:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 09:18:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 09:18:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 09:18:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 09:18:48,973 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 09:18:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:48,973 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 09:18:48,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:18:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 09:18:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:18:48,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:48,974 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-03 09:18:48,974 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:48,974 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-03 09:18:48,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:48,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:48,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:48,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:48,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:51,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:51,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:51,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:51,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 09:18:51,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:51,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:51,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:51,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 09:18:51,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 09:18:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 09:18:51,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:51,685 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-03 09:18:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:54,008 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 09:18:54,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:18:54,009 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-03 09:18:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:54,009 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:18:54,010 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 09:18:54,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.2s impTime 61 [2018-10-03 09:18:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 09:18:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 09:18:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 09:18:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 09:18:54,014 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 09:18:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:54,014 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 09:18:54,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 09:18:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 09:18:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 09:18:54,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:54,015 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-10-03 09:18:54,015 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:54,015 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-10-03 09:18:54,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:54,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:54,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:54,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:54,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:56,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:56,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:56,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:56,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:56,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:56,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 09:18:56,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 09:18:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 09:18:56,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:56,711 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-03 09:18:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:59,118 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 09:18:59,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 09:18:59,119 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-03 09:18:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:59,119 INFO L225 Difference]: With dead ends: 66 [2018-10-03 09:18:59,119 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 09:18:59,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.3s impTime 62 [2018-10-03 09:18:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 09:18:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 09:18:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 09:18:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 09:18:59,124 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 09:18:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:59,124 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 09:18:59,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 09:18:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 09:18:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 09:18:59,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:59,124 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-10-03 09:18:59,125 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:59,125 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-10-03 09:18:59,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:59,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:59,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:01,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:01,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:01,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:01,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:01,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:01,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:01,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:01,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 09:19:01,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:19:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:19:01,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:01,946 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-03 09:19:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:04,503 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 09:19:04,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:19:04,503 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-03 09:19:04,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:04,504 INFO L225 Difference]: With dead ends: 67 [2018-10-03 09:19:04,504 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 09:19:04,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 63 [2018-10-03 09:19:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 09:19:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 09:19:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 09:19:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 09:19:04,510 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 09:19:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:04,510 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 09:19:04,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:19:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 09:19:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 09:19:04,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:04,511 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-10-03 09:19:04,511 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:04,511 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-10-03 09:19:04,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:04,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:04,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:04,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:04,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:07,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:07,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:07,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:07,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 09:19:07,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:07,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:07,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:07,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 09:19:07,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 09:19:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 09:19:07,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:07,386 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-03 09:19:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:09,953 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 09:19:09,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 09:19:09,954 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-03 09:19:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:09,954 INFO L225 Difference]: With dead ends: 68 [2018-10-03 09:19:09,954 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 09:19:09,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 64 [2018-10-03 09:19:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 09:19:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 09:19:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 09:19:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 09:19:09,959 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 09:19:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:09,960 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 09:19:09,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 09:19:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 09:19:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 09:19:09,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:09,960 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-10-03 09:19:09,961 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:09,961 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-10-03 09:19:09,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:09,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:09,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:09,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:09,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:12,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:12,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:12,700 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:12,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:12,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:12,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:12,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:12,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 09:19:12,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 09:19:12,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 09:19:12,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:12,877 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-03 09:19:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:15,877 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 09:19:15,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:19:15,877 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-03 09:19:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:15,878 INFO L225 Difference]: With dead ends: 69 [2018-10-03 09:19:15,878 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 09:19:15,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.5s impTime 65 [2018-10-03 09:19:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 09:19:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 09:19:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 09:19:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 09:19:15,882 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 09:19:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:15,883 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 09:19:15,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 09:19:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 09:19:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 09:19:15,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:15,883 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-10-03 09:19:15,883 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:15,884 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-10-03 09:19:15,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:15,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:15,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:15,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:15,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:18,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:18,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:18,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:18,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 09:19:18,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:18,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:18,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:18,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 09:19:18,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 09:19:18,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 09:19:18,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:18,754 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-03 09:19:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:21,732 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 09:19:21,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 09:19:21,733 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-03 09:19:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:21,734 INFO L225 Difference]: With dead ends: 70 [2018-10-03 09:19:21,734 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 09:19:21,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 66 [2018-10-03 09:19:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 09:19:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 09:19:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 09:19:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 09:19:21,738 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 09:19:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:21,738 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 09:19:21,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 09:19:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 09:19:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 09:19:21,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:21,739 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-10-03 09:19:21,739 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:21,739 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-10-03 09:19:21,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:21,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:21,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:21,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:24,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:24,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:24,721 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:24,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 09:19:24,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:24,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:24,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:24,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 09:19:24,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 09:19:24,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 09:19:24,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:24,923 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-03 09:19:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:27,896 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 09:19:27,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 09:19:27,896 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-03 09:19:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:27,897 INFO L225 Difference]: With dead ends: 71 [2018-10-03 09:19:27,898 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 09:19:27,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.6s impTime 67 [2018-10-03 09:19:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 09:19:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 09:19:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 09:19:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 09:19:27,903 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 09:19:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:27,903 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 09:19:27,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 09:19:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 09:19:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 09:19:27,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:27,904 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-10-03 09:19:27,904 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:27,904 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-10-03 09:19:27,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:27,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:27,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:27,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:27,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:30,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:30,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:30,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:30,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:31,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:31,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 09:19:31,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 09:19:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 09:19:31,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:31,138 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-03 09:19:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:34,017 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 09:19:34,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 09:19:34,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-03 09:19:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:34,018 INFO L225 Difference]: With dead ends: 72 [2018-10-03 09:19:34,019 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 09:19:34,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 68 [2018-10-03 09:19:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 09:19:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 09:19:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 09:19:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 09:19:34,023 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-03 09:19:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:34,023 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 09:19:34,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 09:19:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 09:19:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 09:19:34,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:34,024 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-10-03 09:19:34,024 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:34,024 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-10-03 09:19:34,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:34,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:34,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:34,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:37,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:37,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:37,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:37,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:37,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:37,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:37,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:37,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 09:19:37,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:19:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:19:37,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:37,319 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-03 09:19:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:40,290 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 09:19:40,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:19:40,290 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-03 09:19:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:40,291 INFO L225 Difference]: With dead ends: 73 [2018-10-03 09:19:40,291 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 09:19:40,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 69 [2018-10-03 09:19:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 09:19:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 09:19:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 09:19:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-03 09:19:40,295 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-03 09:19:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:40,296 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-03 09:19:40,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:19:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-03 09:19:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 09:19:40,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:40,296 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-10-03 09:19:40,296 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:40,297 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-10-03 09:19:40,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:40,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:40,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:40,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:40,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:43,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:43,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:43,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:43,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 09:19:43,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:43,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:43,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:43,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 09:19:43,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 09:19:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 09:19:43,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:43,615 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-03 09:19:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:46,848 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-03 09:19:46,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 09:19:46,848 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-03 09:19:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:46,849 INFO L225 Difference]: With dead ends: 74 [2018-10-03 09:19:46,849 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 09:19:46,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.9s impTime 70 [2018-10-03 09:19:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 09:19:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 09:19:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 09:19:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 09:19:46,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-03 09:19:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:46,854 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 09:19:46,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 09:19:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 09:19:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 09:19:46,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:46,855 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-10-03 09:19:46,855 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:46,855 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:46,856 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-10-03 09:19:46,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:46,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:46,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:46,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:46,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:49,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:49,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:49,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:49,893 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:49,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:49,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:50,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:50,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 09:19:50,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 09:19:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 09:19:50,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:50,070 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-03 09:19:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:54,289 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 09:19:54,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 09:19:54,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-03 09:19:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:54,290 INFO L225 Difference]: With dead ends: 75 [2018-10-03 09:19:54,291 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 09:19:54,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 71 [2018-10-03 09:19:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 09:19:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 09:19:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 09:19:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-03 09:19:54,297 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-03 09:19:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:54,297 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-03 09:19:54,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 09:19:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-03 09:19:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 09:19:54,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:54,298 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-10-03 09:19:54,298 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:54,298 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-10-03 09:19:54,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:54,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:54,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:54,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:57,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:57,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:57,563 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:58,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 09:19:58,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:58,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:58,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:58,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 09:19:58,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:19:58,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:19:58,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:58,302 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-03 09:20:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:01,804 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-03 09:20:01,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 09:20:01,805 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-03 09:20:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:01,806 INFO L225 Difference]: With dead ends: 76 [2018-10-03 09:20:01,806 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 09:20:01,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 72 [2018-10-03 09:20:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 09:20:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 09:20:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 09:20:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 09:20:01,811 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-03 09:20:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:01,812 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 09:20:01,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:20:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 09:20:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 09:20:01,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:01,812 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-10-03 09:20:01,813 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:01,813 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-10-03 09:20:01,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:01,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:01,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:01,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:01,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:05,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:05,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:05,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:05,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 09:20:05,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:05,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:06,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:06,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 09:20:06,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 09:20:06,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 09:20:06,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:06,412 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-03 09:20:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:09,944 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 09:20:09,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 09:20:09,945 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-03 09:20:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:09,946 INFO L225 Difference]: With dead ends: 77 [2018-10-03 09:20:09,946 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 09:20:09,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.6s impTime 73 [2018-10-03 09:20:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 09:20:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 09:20:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 09:20:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-03 09:20:09,952 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-03 09:20:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:09,952 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-03 09:20:09,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 09:20:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-03 09:20:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 09:20:09,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:09,953 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-10-03 09:20:09,953 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:09,953 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-10-03 09:20:09,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:09,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:09,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:09,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:09,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:14,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:14,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:14,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:14,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:14,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:14,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 09:20:14,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 09:20:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 09:20:14,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:14,387 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-03 09:20:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:17,980 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-03 09:20:17,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 09:20:17,980 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-03 09:20:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:17,981 INFO L225 Difference]: With dead ends: 78 [2018-10-03 09:20:17,981 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 09:20:17,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.7s impTime 74 [2018-10-03 09:20:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 09:20:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 09:20:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 09:20:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 09:20:17,986 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-03 09:20:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:17,986 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 09:20:17,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 09:20:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 09:20:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 09:20:17,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:17,987 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-10-03 09:20:17,987 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:17,987 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-10-03 09:20:17,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:17,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:17,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:22,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:22,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:22,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:22,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:22,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:22,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:23,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:23,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 09:20:23,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:20:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:20:23,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:23,072 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-03 09:20:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:26,599 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 09:20:26,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 09:20:26,600 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-03 09:20:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:26,601 INFO L225 Difference]: With dead ends: 79 [2018-10-03 09:20:26,601 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 09:20:26,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time 4.3s impTime 75 [2018-10-03 09:20:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 09:20:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 09:20:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 09:20:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-03 09:20:26,606 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-03 09:20:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:26,606 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-03 09:20:26,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:20:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-03 09:20:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 09:20:26,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:26,607 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-10-03 09:20:26,607 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:26,608 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-10-03 09:20:26,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:26,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:26,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:26,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:26,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:30,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:30,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:30,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:30,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 09:20:30,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:30,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:30,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:30,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 09:20:30,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 09:20:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 09:20:30,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:30,669 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-03 09:20:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:34,415 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-03 09:20:34,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 09:20:34,415 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-03 09:20:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:34,416 INFO L225 Difference]: With dead ends: 80 [2018-10-03 09:20:34,416 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 09:20:34,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 76 [2018-10-03 09:20:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 09:20:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 09:20:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 09:20:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 09:20:34,421 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-03 09:20:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:34,421 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 09:20:34,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 09:20:34,421 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 09:20:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 09:20:34,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:34,422 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-10-03 09:20:34,422 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:34,422 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-10-03 09:20:34,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:34,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:34,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:34,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:34,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:38,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:38,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:38,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:38,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:38,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:39,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:39,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 09:20:39,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 09:20:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 09:20:39,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:39,037 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-03 09:20:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:42,836 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 09:20:42,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 09:20:42,837 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-03 09:20:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:42,838 INFO L225 Difference]: With dead ends: 81 [2018-10-03 09:20:42,838 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 09:20:42,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.9s impTime 77 [2018-10-03 09:20:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 09:20:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 09:20:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 09:20:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-03 09:20:42,842 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-03 09:20:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:42,842 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-03 09:20:42,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 09:20:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-03 09:20:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 09:20:42,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:42,843 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-10-03 09:20:42,843 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:42,843 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:42,843 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-10-03 09:20:42,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:42,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:42,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:42,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:42,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:46,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:46,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:46,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:20:46,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 09:20:46,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:46,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:46,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:46,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 09:20:46,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 09:20:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 09:20:46,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:46,754 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-03 09:20:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:50,714 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-03 09:20:50,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 09:20:50,715 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-03 09:20:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:50,715 INFO L225 Difference]: With dead ends: 82 [2018-10-03 09:20:50,716 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 09:20:50,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.3s impTime 78 [2018-10-03 09:20:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 09:20:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 09:20:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 09:20:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 09:20:50,720 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-03 09:20:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:50,720 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 09:20:50,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 09:20:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 09:20:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 09:20:50,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:50,721 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-10-03 09:20:50,722 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:50,722 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-10-03 09:20:50,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:50,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:50,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 09:20:51,237 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:20:51,242 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:20:51,242 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:20:51 BoogieIcfgContainer [2018-10-03 09:20:51,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:20:51,243 INFO L168 Benchmark]: Toolchain (without parser) took 243983.75 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -21.0 MB). Free memory was 1.4 GB in the beginning and 950.0 MB in the end (delta: 474.2 MB). Peak memory consumption was 453.3 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:51,245 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:51,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:51,247 INFO L168 Benchmark]: Boogie Preprocessor took 24.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:51,247 INFO L168 Benchmark]: RCFGBuilder took 227.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:51,248 INFO L168 Benchmark]: TraceAbstraction took 243682.84 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -21.0 MB). Free memory was 1.4 GB in the beginning and 950.0 MB in the end (delta: 453.1 MB). Peak memory consumption was 432.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:51,251 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 227.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243682.84 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -21.0 MB). Free memory was 1.4 GB in the beginning and 950.0 MB in the end (delta: 453.1 MB). Peak memory consumption was 432.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 81 with TraceHistMax 78, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 79 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 243.6s OverallTime, 79 OverallIterations, 78 TraceHistogramMax, 109.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 157 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 167403 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 90.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6161 GetRequests, 3003 SyntacticMatches, 77 SemanticMatches, 3081 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 124.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 78 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 127.5s InterpolantComputationTime, 6316 NumberOfCodeBlocks, 6316 NumberOfCodeBlocksAsserted, 935 NumberOfCheckSat, 6161 ConstructedInterpolants, 0 QuantifiedInterpolants, 2257339 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6391 ConjunctsInSsa, 6237 ConjunctsInUnsatCore, 155 InterpolantComputations, 1 PerfectInterpolantSequences, 0/158158 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-20-51-262.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-20-51-262.csv Completed graceful shutdown