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.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:27:34,090 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:27:34,092 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:27:34,112 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:27:34,113 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:27:34,115 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:27:34,117 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:27:34,119 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:27:34,122 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:27:34,125 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:27:34,127 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 09:27:34,171 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:27:34,196 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:27:34,196 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:27:34,197 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:27:34,197 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:27:34,198 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:27:34,198 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:27:34,198 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:27:34,198 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:27:34,199 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:27:34,199 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:27:34,199 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:27:34,199 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:27:34,199 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:27:34,200 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:27:34,200 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:27:34,200 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:27:34,200 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:27:34,200 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:27:34,201 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:27:34,201 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:27:34,201 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:27:34,201 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:27:34,202 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:27:34,202 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:27:34,202 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:27:34,202 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:27:34,202 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:27:34,203 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:27:34,203 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:27:34,203 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:27:34,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:27:34,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:27:34,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:27:34,284 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:27:34,284 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:27:34,286 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-10-04 09:27:34,286 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-10-04 09:27:34,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:27:34,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:27:34,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:27:34,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:27:34,344 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:27:34,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,387 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:27:34,388 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:27:34,388 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:27:34,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:27:34,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:27:34,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:27:34,391 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:27:34,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... [2018-10-04 09:27:34,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:27:34,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:27:34,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:27:34,420 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:27:34,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:27:34,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:27:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:27:34,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:27:34,668 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:27:34,668 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:27:34 BoogieIcfgContainer [2018-10-04 09:27:34,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:27:34,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:27:34,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:27:34,676 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:27:34,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:27:34" (1/2) ... [2018-10-04 09:27:34,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3bb658 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:27:34, skipping insertion in model container [2018-10-04 09:27:34,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:27:34" (2/2) ... [2018-10-04 09:27:34,684 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-10-04 09:27:34,696 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:27:34,707 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:27:34,756 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:27:34,757 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:27:34,757 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:27:34,757 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:27:34,757 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:27:34,758 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:27:34,758 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:27:34,758 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:27:34,758 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:27:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 09:27:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:27:34,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:34,781 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:27:34,783 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:34,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-04 09:27:34,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:34,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:34,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:34,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:34,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:27:34,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 09:27:34,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:27:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:27:34,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:27:34,971 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 09:27:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:35,032 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:27:35,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:27:35,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:27:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:35,047 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:27:35,047 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:27:35,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:27:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:27:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:27:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:27:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:27:35,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-04 09:27:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,131 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:27:35,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:27:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:27:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:27:35,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,133 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 09:27:35,133 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-04 09:27:35,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:35,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:35,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:35,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:35,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 09:27:35,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:27:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:27:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:27:35,383 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 09:27:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:35,453 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:27:35,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:27:35,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 09:27:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:35,454 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:27:35,454 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:27:35,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:27:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:27:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:27:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:27:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:27:35,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-04 09:27:35,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,460 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:27:35,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:27:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:27:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:27:35,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,460 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-04 09:27:35,461 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-04 09:27:35,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:35,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:35,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:35,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:35,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:35,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:35,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:35,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:35,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 09:27:35,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:27:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:27:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:35,726 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 09:27:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:35,864 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:27:35,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:27:35,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 09:27:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:35,866 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:27:35,866 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:27:35,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:27:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:27:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:27:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:27:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:27:35,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-04 09:27:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:35,871 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:27:35,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:27:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:27:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:27:35,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:35,872 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-04 09:27:35,872 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:35,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-04 09:27:35,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:35,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:35,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:35,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:36,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:36,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:36,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:27:36,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:36,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:36,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 09:27:36,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:27:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:27:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,237 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 09:27:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:36,304 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:27:36,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:27:36,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 09:27:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:36,305 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:27:36,306 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:27:36,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:27:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:27:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:27:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:27:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:27:36,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-04 09:27:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:36,311 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:27:36,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:27:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:27:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:27:36,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:36,312 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-04 09:27:36,312 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:36,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:36,312 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-04 09:27:36,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:36,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:36,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:36,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:36,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:36,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:36,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:36,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:36,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:36,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 09:27:36,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:27:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:27:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:27:36,622 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 09:27:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:36,747 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:27:36,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:27:36,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 09:27:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:36,748 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:27:36,749 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:27:36,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:27:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:27:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:27:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:27:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:27:36,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-04 09:27:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:36,754 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:27:36,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:27:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:27:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:27:36,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:36,755 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-04 09:27:36,756 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:36,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:36,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-04 09:27:36,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:36,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:36,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:36,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:36,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:36,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:37,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 09:27:37,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:37,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:37,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 09:27:37,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:27:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:27:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:27:37,425 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 09:27:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:37,504 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:27:37,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:27:37,506 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 09:27:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:37,507 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:27:37,507 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:27:37,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:27:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:27:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:27:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:27:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:27:37,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-04 09:27:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:37,513 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:27:37,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:27:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:27:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:27:37,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:37,514 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-04 09:27:37,514 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:37,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-04 09:27:37,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:37,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:37,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:37,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:37,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:37,643 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:37,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:27:37,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:37,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:37,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:37,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 09:27:37,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:27:37,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:27:37,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:27:37,873 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 09:27:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:37,936 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:27:37,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:27:37,937 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 09:27:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:37,938 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:27:37,938 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:27:37,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:27:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:27:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:27:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:27:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:27:37,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-04 09:27:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:37,944 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:27:37,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:27:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:27:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:27:37,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:37,945 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-04 09:27:37,946 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:37,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-04 09:27:37,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:37,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:38,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:38,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:38,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:38,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 09:27:38,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:27:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:27:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:27:38,515 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 09:27:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:38,576 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:27:38,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:27:38,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 09:27:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:38,579 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:27:38,579 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:27:38,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:27:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:27:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:27:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:27:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:27:38,584 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-04 09:27:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:38,585 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:27:38,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:27:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:27:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:27:38,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:38,586 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-04 09:27:38,586 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:38,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:38,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-04 09:27:38,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:38,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:38,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:38,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:38,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:38,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:38,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:38,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:38,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:38,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:38,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:38,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 09:27:38,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:27:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:27:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:27:38,941 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 09:27:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:39,020 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:27:39,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:27:39,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 09:27:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:39,022 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:27:39,023 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:27:39,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:27:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:27:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:27:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:27:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:27:39,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-04 09:27:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:39,028 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:27:39,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:27:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:27:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:27:39,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:39,030 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-04 09:27:39,030 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:39,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-04 09:27:39,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:39,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:39,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:39,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:39,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:39,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:39,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 09:27:39,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:39,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:39,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 09:27:39,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:27:39,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:27:39,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:27:39,464 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 09:27:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:39,727 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:27:39,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:27:39,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 09:27:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:39,729 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:27:39,729 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:27:39,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:27:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:27:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:27:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:27:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:27:39,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-04 09:27:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:39,740 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:27:39,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:27:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:27:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:27:39,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:39,741 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-04 09:27:39,741 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:39,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-04 09:27:39,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:39,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:39,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:39,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:39,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:39,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:39,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:40,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:40,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:40,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:40,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:40,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 09:27:40,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:27:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:27:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:27:40,235 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 09:27:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:40,303 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:27:40,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:27:40,304 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 09:27:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:40,305 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:27:40,306 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:27:40,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:27:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:27:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:27:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:27:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:27:40,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-04 09:27:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:40,312 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:27:40,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:27:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:27:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:27:40,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:40,313 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-04 09:27:40,314 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:40,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-04 09:27:40,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:40,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:40,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:40,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:40,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:40,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:40,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:40,511 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:27:40,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:40,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:41,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 09:27:41,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:27:41,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:27:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:27:41,018 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 09:27:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:41,122 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:27:41,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:27:41,123 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 09:27:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:41,124 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:27:41,124 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:27:41,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:27:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:27:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:27:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:27:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:27:41,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-04 09:27:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:41,131 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:27:41,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:27:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:27:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:27:41,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:41,132 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-04 09:27:41,132 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:41,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-04 09:27:41,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:41,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:41,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:41,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:41,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:41,561 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:41,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:27:41,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:41,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:41,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:41,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 09:27:41,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:27:41,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:27:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:27:41,854 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 09:27:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:41,965 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:27:41,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:27:41,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 09:27:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:41,966 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:27:41,967 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:27:41,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:27:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:27:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:27:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:27:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:27:41,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-04 09:27:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:41,973 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:27:41,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:27:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:27:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:27:41,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:41,974 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-04 09:27:41,974 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:41,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-04 09:27:41,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:41,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:41,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:41,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:42,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:42,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:42,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:42,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:42,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 09:27:42,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:27:42,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:27:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:27:42,733 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 09:27:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:42,815 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:27:42,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:27:42,816 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 09:27:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:42,817 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:27:42,817 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:27:42,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:27:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:27:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:27:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:27:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:27:42,823 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-04 09:27:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:42,823 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:27:42,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:27:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:27:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:27:42,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:42,824 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-04 09:27:42,825 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:42,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-04 09:27:42,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:42,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:42,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:42,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:42,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:43,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:43,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:43,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:43,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:43,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:43,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 09:27:43,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:27:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:27:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:27:43,627 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 09:27:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:43,756 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:27:43,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:27:43,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 09:27:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:43,758 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:27:43,758 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:27:43,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:27:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:27:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:27:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:27:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:27:43,764 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-04 09:27:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:43,764 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:27:43,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:27:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:27:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:27:43,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:43,765 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-04 09:27:43,766 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:43,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-04 09:27:43,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:43,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:43,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:43,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:43,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:43,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:43,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:43,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:44,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 09:27:44,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:44,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:44,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 09:27:44,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:27:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:27:44,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:27:44,587 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 09:27:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:44,703 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:27:44,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:27:44,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 09:27:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:44,704 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:27:44,704 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:27:44,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:27:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:27:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:27:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:27:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:27:44,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-04 09:27:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:44,710 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:27:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:27:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:27:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:27:44,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:44,711 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-04 09:27:44,711 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:44,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-04 09:27:44,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:44,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:44,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:44,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:44,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:44,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:44,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:44,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:44,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:44,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:45,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:45,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 09:27:45,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:27:45,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:27:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:27:45,241 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 09:27:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:45,317 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:27:45,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:27:45,318 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 09:27:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:45,319 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:27:45,319 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:27:45,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:27:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:27:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:27:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:27:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:27:45,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-04 09:27:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:45,324 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:27:45,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:27:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:27:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:27:45,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:45,325 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-04 09:27:45,326 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:45,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-04 09:27:45,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:45,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:45,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:45,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:45,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:45,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:45,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:45,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:45,616 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 09:27:45,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:45,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:46,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:46,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 09:27:46,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:27:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:27:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:27:46,091 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 09:27:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:46,415 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:27:46,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:27:46,416 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 09:27:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:46,417 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:27:46,417 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:27:46,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:27:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:27:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:27:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:27:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:27:46,425 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-04 09:27:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:46,426 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:27:46,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:27:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:27:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:27:46,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:46,427 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-04 09:27:46,427 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:46,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-04 09:27:46,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:46,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:46,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:46,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:46,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:46,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:46,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:46,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:46,964 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:27:46,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:46,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:47,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:47,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 09:27:47,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:27:47,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:27:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:27:47,677 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 09:27:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:47,782 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:27:47,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:27:47,782 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 09:27:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:47,783 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:27:47,783 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:27:47,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:27:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:27:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:27:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:27:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:27:47,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-04 09:27:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:47,789 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:27:47,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:27:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:27:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:27:47,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:47,790 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-04 09:27:47,791 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:47,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-04 09:27:47,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:47,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:47,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:47,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:47,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:48,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:48,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:48,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:48,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:49,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 09:27:49,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:27:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:27:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:27:49,175 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 09:27:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:49,306 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:27:49,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:27:49,307 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 09:27:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:49,308 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:27:49,308 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:27:49,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:27:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:27:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:27:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:27:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:27:49,314 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-04 09:27:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:49,315 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:27:49,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:27:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:27:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:27:49,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:49,316 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-04 09:27:49,316 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:49,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-04 09:27:49,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:49,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:49,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:49,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:49,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:49,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:49,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:49,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:49,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:49,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:50,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:50,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 09:27:50,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:27:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:27:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:27:50,382 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 09:27:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:50,510 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:27:50,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:27:50,511 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 09:27:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:50,512 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:27:50,512 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:27:50,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:27:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:27:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:27:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:27:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:27:50,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-04 09:27:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:50,519 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:27:50,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:27:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:27:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:27:50,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:50,520 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-04 09:27:50,521 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:50,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-04 09:27:50,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:50,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:51,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:51,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:51,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:51,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:27:51,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:51,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:51,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:51,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 09:27:51,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:27:51,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:27:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:27:51,935 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 09:27:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:52,081 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:27:52,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:27:52,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 09:27:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:52,085 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:27:52,085 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:27:52,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:27:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:27:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:27:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:27:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:27:52,092 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-04 09:27:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:52,092 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:27:52,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:27:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:27:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:27:52,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:52,092 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-04 09:27:52,093 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:52,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-04 09:27:52,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:52,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:52,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:52,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:53,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:53,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:53,032 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:27:53,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:27:53,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:53,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:53,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:53,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 09:27:53,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:27:53,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:27:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:27:53,736 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 09:27:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:53,833 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:27:53,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:27:53,833 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 09:27:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:53,834 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:27:53,835 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:27:53,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:27:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:27:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:27:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:27:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:27:53,840 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-04 09:27:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:53,841 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:27:53,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:27:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:27:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:27:53,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:53,842 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-04 09:27:53,842 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:53,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-04 09:27:53,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:53,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:53,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:53,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:54,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:54,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:54,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:27:54,684 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 09:27:54,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:54,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:55,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:55,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 09:27:55,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:27:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:27:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:27:55,236 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 09:27:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:55,363 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:27:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:27:55,363 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 09:27:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:55,364 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:27:55,364 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:27:55,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:27:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:27:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:27:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:27:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:27:55,370 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-04 09:27:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:55,370 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:27:55,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:27:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:27:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:27:55,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:55,371 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-04 09:27:55,372 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:55,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-04 09:27:55,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:55,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:55,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:55,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:55,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:55,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:55,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:55,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:27:55,892 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:27:55,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:55,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:56,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:56,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 09:27:56,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:27:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:27:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:27:56,359 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 09:27:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:56,510 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:27:56,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:27:56,511 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 09:27:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:56,511 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:27:56,512 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:27:56,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:27:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:27:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:27:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:27:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:27:56,516 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-04 09:27:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:56,516 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:27:56,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:27:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:27:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:27:56,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:56,517 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-04 09:27:56,517 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:56,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:56,518 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-04 09:27:56,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:56,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:56,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:56,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:56,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:56,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:56,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:56,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:56,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:57,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:57,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 09:27:57,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:27:57,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:27:57,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:27:57,369 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 09:27:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:57,499 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:27:57,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:27:57,500 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 09:27:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:57,501 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:27:57,501 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:27:57,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:27:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:27:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:27:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:27:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:27:57,506 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-04 09:27:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:57,507 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:27:57,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:27:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:27:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:27:57,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:57,507 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-04 09:27:57,508 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:57,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-04 09:27:57,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:57,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:57,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:57,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:57,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:57,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:57,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:57,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:58,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:58,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:58,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:58,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:58,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 09:27:58,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:27:58,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:27:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:27:58,853 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 09:27:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:58,994 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:27:58,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:27:58,995 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 09:27:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:58,995 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:27:58,996 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:27:58,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:27:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:27:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:27:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:27:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:27:59,002 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-04 09:27:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:59,002 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:27:59,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:27:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:27:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:27:59,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:59,003 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-04 09:27:59,003 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:59,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-04 09:27:59,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:59,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:59,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:59,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:27:59,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:59,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:59,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:59,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:27:59,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 09:27:59,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:59,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:00,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:00,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 09:28:00,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:28:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:28:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:28:00,119 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 09:28:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:00,247 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:28:00,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:28:00,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 09:28:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:00,248 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:28:00,248 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:28:00,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:28:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:28:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:28:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:28:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:28:00,254 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-04 09:28:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:00,254 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:28:00,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:28:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:28:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:28:00,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:00,255 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-04 09:28:00,256 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:00,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-04 09:28:00,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:00,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:00,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:00,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:00,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:00,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:00,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:00,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:00,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:00,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:00,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:01,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:01,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 09:28:01,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:28:01,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:28:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:28:01,885 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 09:28:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:02,064 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:28:02,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:28:02,064 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 09:28:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:02,065 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:28:02,066 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:28:02,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:28:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:28:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:28:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:28:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:28:02,071 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-04 09:28:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:02,071 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:28:02,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:28:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:28:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:28:02,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:02,072 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-04 09:28:02,072 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:02,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-04 09:28:02,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:02,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:02,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:02,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:02,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:02,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:02,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:02,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:02,612 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 09:28:02,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:02,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:03,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:03,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 09:28:03,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:28:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:28:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:28:03,191 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 09:28:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:03,340 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:28:03,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:28:03,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 09:28:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:03,341 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:28:03,341 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:28:03,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:28:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:28:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:28:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:28:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 09:28:03,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-04 09:28:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:03,346 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 09:28:03,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:28:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 09:28:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:28:03,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:03,346 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-04 09:28:03,346 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:03,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-04 09:28:03,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:03,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:03,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:03,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:04,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:04,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:04,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:04,112 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:28:04,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:04,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:04,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:04,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 09:28:04,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:28:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:28:04,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:28:04,836 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 09:28:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:04,955 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:28:04,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:28:04,955 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 09:28:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:04,956 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:28:04,956 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:28:04,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:28:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:28:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:28:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:28:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 09:28:04,961 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-04 09:28:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:04,962 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 09:28:04,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:28:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 09:28:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:28:04,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:04,962 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-04 09:28:04,963 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:04,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-04 09:28:04,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:04,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:04,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:04,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:04,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:05,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:05,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:05,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:05,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:06,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:06,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 09:28:06,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:28:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:28:06,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:28:06,203 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 09:28:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:06,393 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:28:06,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:28:06,393 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 09:28:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:06,394 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:28:06,394 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:28:06,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:28:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:28:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:28:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:28:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 09:28:06,399 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-04 09:28:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:06,400 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 09:28:06,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:28:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 09:28:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:28:06,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:06,401 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-04 09:28:06,401 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:06,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-04 09:28:06,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:06,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:06,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:06,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:07,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:07,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:07,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:07,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:07,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:07,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:07,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:07,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 09:28:07,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:28:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:28:07,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:28:07,876 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 09:28:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:08,009 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:28:08,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:28:08,009 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 09:28:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:08,010 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:28:08,011 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:28:08,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:28:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:28:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:28:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:28:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 09:28:08,016 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-04 09:28:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:08,016 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 09:28:08,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:28:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 09:28:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:28:08,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:08,017 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-04 09:28:08,017 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:08,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-04 09:28:08,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:08,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:08,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:08,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:08,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:08,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:08,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:08,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:09,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 09:28:09,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:09,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:09,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:09,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 09:28:09,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:28:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:28:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:28:09,776 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 09:28:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:09,949 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:28:09,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:28:09,949 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 09:28:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:09,950 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:28:09,950 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:28:09,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:28:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:28:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:28:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:28:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 09:28:09,956 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-04 09:28:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:09,957 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 09:28:09,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:28:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 09:28:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:28:09,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:09,957 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-04 09:28:09,958 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:09,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:09,958 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-04 09:28:09,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:09,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:09,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:09,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:09,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:10,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:10,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:10,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:10,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:10,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:10,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:11,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:11,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 09:28:11,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:28:11,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:28:11,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:28:11,631 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 09:28:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:11,808 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:28:11,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:28:11,809 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 09:28:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:11,810 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:28:11,810 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:28:11,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:28:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:28:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:28:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:28:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 09:28:11,815 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-04 09:28:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:11,816 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 09:28:11,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:28:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 09:28:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:28:11,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:11,817 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-04 09:28:11,817 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:11,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-04 09:28:11,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:11,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:11,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:11,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:11,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:12,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:12,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:12,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:12,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:28:12,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:12,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:13,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:13,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 09:28:13,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:28:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:28:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:28:13,549 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 09:28:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:13,908 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:28:13,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:28:13,908 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 09:28:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:13,908 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:28:13,909 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:28:13,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:28:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:28:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:28:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:28:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 09:28:13,912 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-04 09:28:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:13,912 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 09:28:13,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:28:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 09:28:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:28:13,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:13,912 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-04 09:28:13,913 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:13,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-04 09:28:13,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:13,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:13,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:13,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:13,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:14,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:14,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:14,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:14,731 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:28:14,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:14,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:15,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:15,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 09:28:15,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:28:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:28:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:28:15,597 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 09:28:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:15,769 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:28:15,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:28:15,770 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 09:28:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:15,770 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:28:15,771 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:28:15,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:28:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:28:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:28:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:28:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 09:28:15,775 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-04 09:28:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:15,775 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 09:28:15,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:28:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 09:28:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:28:15,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:15,776 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-04 09:28:15,776 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:15,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-04 09:28:15,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:15,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:15,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:15,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:15,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:16,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:16,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:16,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:16,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:17,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:17,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 09:28:17,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:28:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:28:17,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:28:17,825 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 09:28:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:17,993 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:28:17,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:28:17,993 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 09:28:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:17,994 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:28:17,994 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:28:17,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:28:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:28:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:28:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:28:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 09:28:17,999 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-04 09:28:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:17,999 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 09:28:17,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:28:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 09:28:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:28:18,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:18,000 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-04 09:28:18,000 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:18,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-04 09:28:18,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:18,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:18,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:18,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:18,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:18,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:18,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:18,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:18,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:18,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:18,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:19,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:19,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 09:28:19,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:28:19,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:28:19,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:28:19,939 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 09:28:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:20,111 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:28:20,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:28:20,111 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 09:28:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:20,112 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:28:20,112 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:28:20,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:28:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:28:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:28:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:28:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 09:28:20,117 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-04 09:28:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:20,118 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 09:28:20,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:28:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 09:28:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:28:20,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:20,119 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-04 09:28:20,119 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:20,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-04 09:28:20,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:20,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:20,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:20,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:20,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:21,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:21,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:21,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:21,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 09:28:21,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:21,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:22,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:22,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 09:28:22,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:28:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:28:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:28:22,207 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 09:28:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:22,384 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:28:22,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:28:22,385 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 09:28:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:22,386 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:28:22,386 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:28:22,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:28:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:28:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:28:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:28:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 09:28:22,391 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-04 09:28:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:22,391 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 09:28:22,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:28:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 09:28:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:28:22,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:22,392 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-04 09:28:22,392 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:22,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:22,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-04 09:28:22,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:22,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:22,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:22,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:23,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:23,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:23,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:23,226 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:23,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:23,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:24,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:24,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 09:28:24,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:28:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:28:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:28:24,538 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 09:28:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:24,702 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:28:24,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:28:24,703 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 09:28:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:24,704 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:28:24,704 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:28:24,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:28:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:28:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:28:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:28:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 09:28:24,709 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-04 09:28:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:24,709 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 09:28:24,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:28:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 09:28:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:28:24,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:24,710 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-04 09:28:24,710 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:24,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:24,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-04 09:28:24,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:24,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:24,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:24,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:25,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:25,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:25,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:25,829 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 09:28:25,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:25,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:26,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:26,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 09:28:26,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:28:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:28:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:28:26,996 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 09:28:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:27,184 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:28:27,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:28:27,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 09:28:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:27,186 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:28:27,186 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:28:27,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:28:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:28:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:28:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:28:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 09:28:27,192 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-04 09:28:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:27,192 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 09:28:27,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:28:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 09:28:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:28:27,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:27,193 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-04 09:28:27,193 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:27,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-04 09:28:27,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:27,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:27,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:27,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:27,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:28,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:28,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:28,112 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:28,152 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:28:28,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:28,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:29,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:29,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 09:28:29,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:28:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:28:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:28:29,632 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 09:28:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:29,836 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:28:29,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:28:29,836 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 09:28:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:29,837 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:28:29,838 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:28:29,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:28:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:28:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:28:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:28:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 09:28:29,842 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-04 09:28:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:29,843 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 09:28:29,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:28:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 09:28:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:28:29,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:29,843 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-04 09:28:29,844 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:29,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:29,844 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-04 09:28:29,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:29,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:29,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:29,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:29,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:31,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:31,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:31,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:31,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:32,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:32,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 09:28:32,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:28:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:28:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:28:32,634 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 09:28:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:32,808 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:28:32,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:28:32,809 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 09:28:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:32,810 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:28:32,810 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:28:32,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:28:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:28:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:28:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:28:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 09:28:32,814 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-04 09:28:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:32,814 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 09:28:32,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:28:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 09:28:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:28:32,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:32,815 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-04 09:28:32,816 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:32,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-04 09:28:32,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:32,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:32,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:32,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:32,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:33,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:33,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:33,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:33,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:33,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:33,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:35,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:35,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 09:28:35,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:28:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:28:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:28:35,295 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 09:28:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:35,491 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:28:35,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:28:35,492 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 09:28:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:35,493 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:28:35,493 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:28:35,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:28:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:28:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:28:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:28:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 09:28:35,498 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-04 09:28:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:35,499 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 09:28:35,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:28:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 09:28:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:28:35,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:35,500 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-04 09:28:35,500 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:35,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:35,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-04 09:28:35,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:35,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:35,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:35,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:35,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:36,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:36,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:36,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:36,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 09:28:36,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:36,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:38,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:38,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 09:28:38,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:28:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:28:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:28:38,003 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 09:28:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:38,215 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:28:38,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:28:38,216 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 09:28:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:38,217 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:28:38,217 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:28:38,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:28:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:28:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:28:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:28:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 09:28:38,222 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-04 09:28:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:38,222 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 09:28:38,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:28:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 09:28:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:28:38,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:38,223 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-04 09:28:38,223 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:38,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-04 09:28:38,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:38,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:38,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:38,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:38,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:39,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:39,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:39,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:28:39,762 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:28:39,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:39,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:41,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:41,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 09:28:41,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:28:41,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:28:41,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:28:41,121 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 09:28:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:41,307 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:28:41,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:28:41,308 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 09:28:41,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:41,309 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:28:41,309 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:28:41,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:28:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:28:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:28:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:28:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 09:28:41,314 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-04 09:28:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:41,315 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 09:28:41,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:28:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 09:28:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:28:41,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:41,316 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-04 09:28:41,316 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:41,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:41,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-04 09:28:41,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:41,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:41,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:41,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:41,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:42,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:42,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:42,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:28:42,463 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 09:28:42,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:42,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:43,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:43,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 09:28:43,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:28:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:28:43,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:28:43,888 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 09:28:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:44,118 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:28:44,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:28:44,118 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 09:28:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:44,119 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:28:44,119 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:28:44,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:28:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:28:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:28:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:28:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 09:28:44,125 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-04 09:28:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:44,125 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 09:28:44,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:28:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 09:28:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:28:44,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:44,126 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-04 09:28:44,126 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:44,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-04 09:28:44,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:44,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:44,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:44,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:44,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:45,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:45,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:45,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:28:45,745 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:28:45,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:45,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:47,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:47,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 09:28:47,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:28:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:28:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:28:47,154 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 09:28:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:47,412 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:28:47,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:28:47,412 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 09:28:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:47,413 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:28:47,414 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:28:47,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:28:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:28:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:28:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:28:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 09:28:47,419 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-04 09:28:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:47,419 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 09:28:47,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:28:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 09:28:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:28:47,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:47,420 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-04 09:28:47,420 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:47,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-04 09:28:47,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:47,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:47,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:47,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:47,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:48,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:48,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:48,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:49,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:51,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:51,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 09:28:51,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:28:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:28:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:28:51,323 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 09:28:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:51,594 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:28:51,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:28:51,594 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 09:28:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:51,595 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:28:51,596 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:28:51,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:28:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:28:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:28:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:28:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 09:28:51,601 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-04 09:28:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:51,601 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 09:28:51,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:28:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 09:28:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:28:51,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:51,602 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-04 09:28:51,603 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:51,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-04 09:28:51,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:51,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:51,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:28:51,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:52,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:52,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:52,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:28:52,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:28:52,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:52,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:28:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:55,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:28:55,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 09:28:55,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:28:55,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:28:55,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:28:55,071 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 09:28:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:28:57,132 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:28:57,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:28:57,132 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 09:28:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:28:57,133 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:28:57,133 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:28:57,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:28:57,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:28:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:28:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:28:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 09:28:57,139 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-04 09:28:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:28:57,139 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 09:28:57,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:28:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 09:28:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:28:57,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:28:57,140 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-04 09:28:57,144 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:28:57,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:28:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-04 09:28:57,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:28:57,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:28:57,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:57,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:28:57,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:28:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:28:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:28:58,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:28:58,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:28:58,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:28:58,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 09:28:58,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:28:58,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:00,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:00,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 09:29:00,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:29:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:29:00,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:29:00,564 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-04 09:29:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:00,843 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:29:00,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:29:00,844 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-04 09:29:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:00,845 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:29:00,845 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:29:00,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:29:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:29:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:29:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:29:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 09:29:00,851 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-04 09:29:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:00,851 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 09:29:00,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:29:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 09:29:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:29:00,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:00,852 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-04 09:29:00,852 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:00,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-04 09:29:00,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:00,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:00,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:02,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:02,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:02,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:02,320 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:02,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:02,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:03,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:03,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 09:29:03,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:29:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:29:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:29:03,914 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-04 09:29:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:04,125 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:29:04,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:29:04,125 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-04 09:29:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:04,127 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:29:04,127 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:29:04,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:29:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:29:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:29:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:29:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 09:29:04,132 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-04 09:29:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:04,132 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 09:29:04,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:29:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 09:29:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:29:04,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:04,133 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-04 09:29:04,134 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:04,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-04 09:29:04,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:04,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:04,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:04,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:05,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:05,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:05,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:05,889 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 09:29:05,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:05,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:07,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:07,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 09:29:07,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:29:07,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:29:07,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:29:07,760 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-04 09:29:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:07,976 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:29:07,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:29:07,977 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-04 09:29:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:07,978 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:29:07,978 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:29:07,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:29:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:29:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:29:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:29:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 09:29:07,983 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-04 09:29:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:07,983 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 09:29:07,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:29:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 09:29:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:29:07,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:07,984 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-04 09:29:07,984 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:07,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-04 09:29:07,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:07,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:07,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:07,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:07,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:09,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:09,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:09,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:09,478 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:29:09,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:09,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:11,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:11,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 09:29:11,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:29:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:29:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:29:11,511 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-04 09:29:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:11,764 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:29:11,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:29:11,765 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-04 09:29:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:11,766 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:29:11,766 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:29:11,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:29:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:29:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:29:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:29:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 09:29:11,772 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-04 09:29:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:11,772 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 09:29:11,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:29:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 09:29:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:29:11,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:11,773 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-04 09:29:11,774 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:11,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-04 09:29:11,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:11,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:11,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:11,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:11,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:13,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:13,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:13,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:13,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:14,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:14,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 09:29:14,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 09:29:14,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 09:29:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:29:14,924 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-04 09:29:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:15,441 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:29:15,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:29:15,442 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-04 09:29:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:15,443 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:29:15,443 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:29:15,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 09:29:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:29:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:29:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:29:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-04 09:29:15,450 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-04 09:29:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:15,450 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-04 09:29:15,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 09:29:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-04 09:29:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 09:29:15,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:15,451 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-04 09:29:15,451 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:15,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-04 09:29:15,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:15,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:15,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:15,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:15,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:17,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:17,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:17,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:17,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:17,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:17,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:19,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:19,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 09:29:19,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 09:29:19,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 09:29:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:29:19,005 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-04 09:29:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:19,305 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-04 09:29:19,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:29:19,305 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-04 09:29:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:19,306 INFO L225 Difference]: With dead ends: 119 [2018-10-04 09:29:19,306 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 09:29:19,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:29:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 09:29:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 09:29:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 09:29:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-04 09:29:19,311 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-04 09:29:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:19,311 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-04 09:29:19,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 09:29:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-04 09:29:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:29:19,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:19,312 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-04 09:29:19,312 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:19,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:19,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-04 09:29:19,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:19,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:19,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:19,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:19,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:21,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:21,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:21,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:21,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 09:29:21,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:21,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:23,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:23,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 09:29:23,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 09:29:23,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 09:29:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:29:23,147 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-04 09:29:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:23,401 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 09:29:23,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:29:23,401 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-04 09:29:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:23,402 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:29:23,402 INFO L226 Difference]: Without dead ends: 120 [2018-10-04 09:29:23,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 09:29:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-04 09:29:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-04 09:29:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:29:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-04 09:29:23,407 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-04 09:29:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:23,408 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-04 09:29:23,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 09:29:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-04 09:29:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 09:29:23,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:23,408 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-04 09:29:23,408 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:23,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-04 09:29:23,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:23,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:23,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:23,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:23,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:25,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:25,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:25,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:25,559 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:25,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:25,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:27,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:27,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 09:29:27,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 09:29:27,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 09:29:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 09:29:27,865 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-04 09:29:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:28,154 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-04 09:29:28,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:29:28,154 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-04 09:29:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:28,155 INFO L225 Difference]: With dead ends: 123 [2018-10-04 09:29:28,156 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 09:29:28,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 09:29:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 09:29:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 09:29:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 09:29:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-04 09:29:28,163 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-04 09:29:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:28,163 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-04 09:29:28,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 09:29:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-04 09:29:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 09:29:28,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:28,164 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-04 09:29:28,164 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:28,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-04 09:29:28,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:28,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:28,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:28,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:28,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:30,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:30,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:30,405 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:30,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 09:29:30,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:30,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:32,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:32,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 09:29:32,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 09:29:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 09:29:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 09:29:32,777 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-04 09:29:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:33,043 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 09:29:33,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:29:33,044 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-04 09:29:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:33,045 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:29:33,045 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:29:33,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 09:29:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:29:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 09:29:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 09:29:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-04 09:29:33,051 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-04 09:29:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:33,052 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-04 09:29:33,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 09:29:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-04 09:29:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:29:33,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:33,053 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-04 09:29:33,053 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:33,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-04 09:29:33,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:33,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:33,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:33,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:33,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:35,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:35,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:29:35,061 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:29:35,131 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 09:29:35,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:35,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:37,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:37,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 09:29:37,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 09:29:37,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 09:29:37,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 09:29:37,463 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-04 09:29:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:37,715 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-04 09:29:37,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:29:37,716 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-04 09:29:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:37,717 INFO L225 Difference]: With dead ends: 127 [2018-10-04 09:29:37,717 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 09:29:37,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-04 09:29:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 09:29:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 09:29:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 09:29:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-04 09:29:37,722 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-04 09:29:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:37,723 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-04 09:29:37,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 09:29:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-04 09:29:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 09:29:37,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:37,723 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-04 09:29:37,724 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:37,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:37,724 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-04 09:29:37,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:37,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:37,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:37,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:37,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:39,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:39,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:29:39,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:39,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:41,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:41,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 09:29:41,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 09:29:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 09:29:41,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 09:29:41,863 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-04 09:29:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:42,170 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 09:29:42,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:29:42,171 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-04 09:29:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:42,172 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:29:42,172 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 09:29:42,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 09:29:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 09:29:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 09:29:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 09:29:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-04 09:29:42,177 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-04 09:29:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:42,177 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-04 09:29:42,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 09:29:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-04 09:29:42,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 09:29:42,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:42,178 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-04 09:29:42,178 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:42,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-04 09:29:42,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:42,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:42,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:42,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:29:42,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:43,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:43,929 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 [2018-10-04 09:29:43,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:29:43,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:29:43,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:43,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:46,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:46,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-04 09:29:46,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-04 09:29:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-04 09:29:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 09:29:46,477 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-04 09:29:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:46,738 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-04 09:29:46,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:29:46,738 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-04 09:29:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:46,739 INFO L225 Difference]: With dead ends: 131 [2018-10-04 09:29:46,739 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 09:29:46,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 09:29:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 09:29:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 09:29:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:29:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-04 09:29:46,745 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-04 09:29:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:46,745 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-04 09:29:46,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-04 09:29:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-04 09:29:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-04 09:29:46,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:46,746 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-04 09:29:46,747 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:46,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-04 09:29:46,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:46,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:46,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:46,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:46,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:48,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:48,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:29:48,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:29:48,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 09:29:48,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:48,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:50,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:50,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-04 09:29:50,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 09:29:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 09:29:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 09:29:50,843 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-04 09:29:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:51,257 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 09:29:51,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:29:51,257 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-04 09:29:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:51,258 INFO L225 Difference]: With dead ends: 133 [2018-10-04 09:29:51,258 INFO L226 Difference]: Without dead ends: 132 [2018-10-04 09:29:51,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 09:29:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-04 09:29:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-04 09:29:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-04 09:29:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-04 09:29:51,265 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-04 09:29:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:51,265 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-04 09:29:51,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 09:29:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-04 09:29:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 09:29:51,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:51,266 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-04 09:29:51,267 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:51,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-04 09:29:51,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:51,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:51,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:51,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:51,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:53,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:53,107 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 [2018-10-04 09:29:53,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:29:53,151 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:29:53,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:53,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:29:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:55,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:29:55,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 09:29:55,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-04 09:29:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-04 09:29:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 09:29:55,488 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-04 09:29:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:29:55,759 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-04 09:29:55,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:29:55,760 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-04 09:29:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:29:55,761 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:29:55,761 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:29:55,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-04 09:29:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:29:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-04 09:29:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-04 09:29:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-04 09:29:55,767 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-04 09:29:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:29:55,767 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-04 09:29:55,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-04 09:29:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-04 09:29:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 09:29:55,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:29:55,768 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-04 09:29:55,769 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:29:55,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:29:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-04 09:29:55,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:29:55,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:29:55,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:55,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:29:55,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:29:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:29:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:29:57,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:29:57,997 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 [2018-10-04 09:29:58,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:29:58,078 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 09:29:58,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:29:58,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:01,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:01,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-04 09:30:01,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 09:30:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 09:30:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 09:30:01,137 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-04 09:30:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:01,567 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 09:30:01,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:30:01,568 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-04 09:30:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:01,569 INFO L225 Difference]: With dead ends: 137 [2018-10-04 09:30:01,569 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:30:01,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 09:30:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:30:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:30:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:30:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-04 09:30:01,575 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-04 09:30:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:01,576 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-04 09:30:01,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 09:30:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-04 09:30:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 09:30:01,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:01,577 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-04 09:30:01,577 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:01,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-04 09:30:01,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:01,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:03,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:03,487 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 [2018-10-04 09:30:03,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:03,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 09:30:03,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:03,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:06,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:06,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-04 09:30:06,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-04 09:30:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-04 09:30:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 09:30:06,093 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-04 09:30:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:06,492 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-04 09:30:06,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:30:06,492 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-04 09:30:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:06,493 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:30:06,493 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 09:30:06,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-04 09:30:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 09:30:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-04 09:30:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-04 09:30:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-04 09:30:06,499 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-04 09:30:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:06,499 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-04 09:30:06,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-04 09:30:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-04 09:30:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:30:06,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:06,500 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-04 09:30:06,500 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:06,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-04 09:30:06,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:06,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:06,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:06,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:08,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:08,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:30:08,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:08,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:11,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:11,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 09:30:11,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 09:30:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 09:30:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 09:30:11,043 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-04 09:30:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:11,353 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 09:30:11,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:30:11,354 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-04 09:30:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:11,355 INFO L225 Difference]: With dead ends: 141 [2018-10-04 09:30:11,355 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 09:30:11,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 09:30:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 09:30:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 09:30:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:30:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-04 09:30:11,362 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-04 09:30:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:11,362 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-04 09:30:11,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 09:30:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-04 09:30:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-04 09:30:11,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:11,365 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-04 09:30:11,365 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:11,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-04 09:30:11,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:11,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:11,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:11,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:13,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:13,590 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 [2018-10-04 09:30:13,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:13,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:13,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:13,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:16,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:16,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-04 09:30:16,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-04 09:30:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-04 09:30:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 09:30:16,213 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-04 09:30:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:16,556 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-04 09:30:16,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:30:16,556 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-04 09:30:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:16,557 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:30:16,557 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 09:30:16,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 09:30:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 09:30:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 09:30:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 09:30:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-04 09:30:16,561 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-04 09:30:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:16,562 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-04 09:30:16,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-04 09:30:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-04 09:30:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-04 09:30:16,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:16,563 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-04 09:30:16,563 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:16,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:16,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-04 09:30:16,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:16,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:16,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:16,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:16,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:18,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:18,836 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 [2018-10-04 09:30:18,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:18,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 09:30:18,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:18,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:21,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:21,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-04 09:30:21,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 09:30:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 09:30:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 09:30:21,545 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-04 09:30:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:22,004 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 09:30:22,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:30:22,004 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-04 09:30:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:22,006 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:30:22,006 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 09:30:22,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 09:30:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 09:30:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-04 09:30:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-04 09:30:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-04 09:30:22,012 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-04 09:30:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:22,012 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-04 09:30:22,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 09:30:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-04 09:30:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:30:22,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:22,013 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-04 09:30:22,013 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:22,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-04 09:30:22,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:22,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:22,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:22,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:22,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:24,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:24,208 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 [2018-10-04 09:30:24,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:30:24,253 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:30:24,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:24,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:27,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:27,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-04 09:30:27,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-04 09:30:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-04 09:30:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 09:30:27,480 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-04 09:30:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:27,874 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-04 09:30:27,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:30:27,875 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-04 09:30:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:27,876 INFO L225 Difference]: With dead ends: 147 [2018-10-04 09:30:27,876 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:30:27,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-04 09:30:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:30:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 09:30:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 09:30:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-04 09:30:27,882 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-04 09:30:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:27,882 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-04 09:30:27,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-04 09:30:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-04 09:30:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-04 09:30:27,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:27,883 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-04 09:30:27,883 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:27,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-04 09:30:27,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:27,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:27,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:27,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:27,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:30,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:30,076 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 [2018-10-04 09:30:30,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:30:30,283 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 09:30:30,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:30,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:33,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:33,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-04 09:30:33,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 09:30:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 09:30:33,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 09:30:33,716 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-04 09:30:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:34,092 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 09:30:34,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:30:34,093 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-04 09:30:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:34,094 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:30:34,095 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 09:30:34,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 09:30:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 09:30:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 09:30:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 09:30:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-04 09:30:34,100 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-04 09:30:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:34,101 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-04 09:30:34,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 09:30:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-04 09:30:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:30:34,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:34,102 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-04 09:30:34,102 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:34,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-04 09:30:34,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:34,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:34,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:34,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:34,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:36,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:36,385 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 [2018-10-04 09:30:36,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:30:36,486 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 09:30:36,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:36,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:39,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:39,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-04 09:30:39,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-04 09:30:39,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-04 09:30:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 09:30:39,688 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-04 09:30:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:40,292 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-04 09:30:40,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:30:40,293 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-04 09:30:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:40,294 INFO L225 Difference]: With dead ends: 151 [2018-10-04 09:30:40,294 INFO L226 Difference]: Without dead ends: 150 [2018-10-04 09:30:40,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-04 09:30:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-04 09:30:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-04 09:30:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:30:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-04 09:30:40,300 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-04 09:30:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:40,301 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-04 09:30:40,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-04 09:30:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-04 09:30:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 09:30:40,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:40,302 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-04 09:30:40,302 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:40,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-04 09:30:40,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:40,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:40,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:40,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:40,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:42,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:42,853 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 [2018-10-04 09:30:42,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:42,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:45,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:45,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-04 09:30:45,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 09:30:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 09:30:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 09:30:45,911 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-04 09:30:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:46,281 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 09:30:46,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:30:46,281 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-04 09:30:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:46,282 INFO L225 Difference]: With dead ends: 153 [2018-10-04 09:30:46,282 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 09:30:46,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 09:30:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 09:30:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-04 09:30:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-04 09:30:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-04 09:30:46,289 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-04 09:30:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:46,289 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-04 09:30:46,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 09:30:46,289 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-04 09:30:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-04 09:30:46,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:46,290 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-04 09:30:46,290 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:46,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:46,291 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-04 09:30:46,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:46,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:46,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:46,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:30:46,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:49,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:49,102 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 [2018-10-04 09:30:49,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:30:49,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:30:49,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:49,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:52,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:52,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-04 09:30:52,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-04 09:30:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-04 09:30:52,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 09:30:52,280 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-04 09:30:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:52,783 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-04 09:30:52,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:30:52,783 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-04 09:30:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:52,784 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:30:52,785 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:30:52,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 09:30:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:30:52,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 09:30:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 09:30:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-04 09:30:52,789 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-04 09:30:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:52,789 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-04 09:30:52,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-04 09:30:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-04 09:30:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 09:30:52,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:52,790 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-04 09:30:52,790 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:52,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-04 09:30:52,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:52,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:52,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:52,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:52,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:30:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:55,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:30:55,234 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 [2018-10-04 09:30:55,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:30:55,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 09:30:55,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:30:55,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:30:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:30:58,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:30:58,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-04 09:30:58,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 09:30:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 09:30:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-04 09:30:58,666 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-04 09:30:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:30:59,088 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 09:30:59,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:30:59,088 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-04 09:30:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:30:59,089 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:30:59,090 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 09:30:59,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-04 09:30:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 09:30:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 09:30:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 09:30:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-04 09:30:59,095 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-04 09:30:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:30:59,095 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-04 09:30:59,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 09:30:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-04 09:30:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 09:30:59,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:30:59,096 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-04 09:30:59,096 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:30:59,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:30:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-04 09:30:59,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:30:59,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:30:59,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:59,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:30:59,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:30:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:01,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:01,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 09:31:01,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:31:01,642 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:31:01,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:01,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:05,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:05,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-04 09:31:05,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-04 09:31:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-04 09:31:05,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 09:31:05,013 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-04 09:31:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:05,356 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-04 09:31:05,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:31:05,356 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-04 09:31:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:05,357 INFO L225 Difference]: With dead ends: 159 [2018-10-04 09:31:05,357 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 09:31:05,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-04 09:31:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 09:31:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 09:31:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 09:31:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-04 09:31:05,362 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-04 09:31:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:05,363 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-04 09:31:05,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-04 09:31:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-04 09:31:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 09:31:05,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:05,363 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-04 09:31:05,364 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:05,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-04 09:31:05,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:05,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:05,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:05,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:05,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:08,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:08,295 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 [2018-10-04 09:31:08,303 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:31:08,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 09:31:08,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:08,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:11,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:11,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-04 09:31:11,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 09:31:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 09:31:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 09:31:11,709 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-04 09:31:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:12,099 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 09:31:12,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:31:12,099 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-04 09:31:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:12,101 INFO L225 Difference]: With dead ends: 161 [2018-10-04 09:31:12,101 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 09:31:12,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 09:31:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 09:31:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 09:31:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:31:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-04 09:31:12,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-04 09:31:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:12,108 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-04 09:31:12,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 09:31:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-04 09:31:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-04 09:31:12,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:12,109 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-04 09:31:12,109 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:12,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-04 09:31:12,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:12,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:12,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:12,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:12,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:15,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:15,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:15,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:31:15,178 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 09:31:15,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:15,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:18,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:18,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-04 09:31:18,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-04 09:31:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-04 09:31:18,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 09:31:18,755 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-04 09:31:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:19,178 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-04 09:31:19,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:31:19,179 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-04 09:31:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:19,180 INFO L225 Difference]: With dead ends: 163 [2018-10-04 09:31:19,180 INFO L226 Difference]: Without dead ends: 162 [2018-10-04 09:31:19,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-04 09:31:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-04 09:31:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-04 09:31:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-04 09:31:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-04 09:31:19,187 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-04 09:31:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:19,187 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-04 09:31:19,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-04 09:31:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-04 09:31:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 09:31:19,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:19,188 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-04 09:31:19,188 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:19,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:19,189 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-04 09:31:19,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:19,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:19,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:19,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:19,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:21,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:21,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:21,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:21,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:25,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:25,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-04 09:31:25,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 09:31:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 09:31:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-04 09:31:25,711 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-04 09:31:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:26,115 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 09:31:26,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:31:26,116 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-04 09:31:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:26,116 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:31:26,117 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:31:26,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-04 09:31:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:31:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 09:31:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 09:31:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-04 09:31:26,122 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-04 09:31:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:26,122 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-04 09:31:26,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 09:31:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-04 09:31:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:31:26,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:26,123 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-04 09:31:26,124 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:26,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-04 09:31:26,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:26,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:26,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:31:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:31:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:29,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:31:29,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:31:29,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:31:29,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:31:29,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:31:29,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:31:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:31:32,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:31:32,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-10-04 09:31:32,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-04 09:31:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-04 09:31:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-04 09:31:32,720 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-10-04 09:31:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:31:33,142 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-04 09:31:33,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:31:33,143 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-10-04 09:31:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:31:33,144 INFO L225 Difference]: With dead ends: 167 [2018-10-04 09:31:33,144 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 09:31:33,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-04 09:31:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 09:31:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 09:31:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 09:31:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-04 09:31:33,150 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-10-04 09:31:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:31:33,150 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-04 09:31:33,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-04 09:31:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-04 09:31:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-04 09:31:33,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:31:33,151 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-10-04 09:31:33,151 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:31:33,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:31:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-10-04 09:31:33,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:31:33,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:31:33,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:33,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:31:33,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:31:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:31:33,404 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:31:33,408 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:31:33,409 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:31:33 BoogieIcfgContainer [2018-10-04 09:31:33,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:31:33,409 INFO L168 Benchmark]: Toolchain (without parser) took 239068.10 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -144.7 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 345.2 MB). Peak memory consumption was 200.5 MB. Max. memory is 7.1 GB. [2018-10-04 09:31:33,411 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:31:33,411 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:31:33,411 INFO L168 Benchmark]: Boogie Preprocessor took 28.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:31:33,412 INFO L168 Benchmark]: RCFGBuilder took 248.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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. [2018-10-04 09:31:33,412 INFO L168 Benchmark]: TraceAbstraction took 238739.18 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -144.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 324.0 MB). Peak memory consumption was 179.3 MB. Max. memory is 7.1 GB. [2018-10-04 09:31:33,415 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 248.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 238739.18 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -144.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 324.0 MB). Peak memory consumption was 179.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 166 with TraceHistMax 82, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 238.6s OverallTime, 82 OverallIterations, 82 TraceHistogramMax, 20.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13557 SolverSat, 260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9961 GetRequests, 3320 SyntacticMatches, 0 SemanticMatches, 6641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354240 ImplicationChecksByTransitivity, 204.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=81, 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, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 209.4s InterpolantComputationTime, 13443 NumberOfCodeBlocks, 13443 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 13282 ConstructedInterpolants, 0 QuantifiedInterpolants, 8661140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13600 ConjunctsInSsa, 3480 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/354240 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-31-33-424.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-31-33-424.csv Completed graceful shutdown