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 0.1.23-1cc990c [2018-09-30 20:25:32,047 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:25:32,049 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:25:32,062 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:25:32,062 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:25:32,063 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:25:32,065 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:25:32,066 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:25:32,068 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:25:32,069 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:25:32,070 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:25:32,115 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 [2018-09-30 20:25:32,143 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:25:32,143 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:25:32,145 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:25:32,145 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:25:32,146 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:25:32,146 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:25:32,146 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:25:32,146 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:25:32,146 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:25:32,147 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:25:32,147 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:25:32,147 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:25:32,147 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:25:32,147 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:25:32,149 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:25:32,149 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:25:32,149 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:25:32,150 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:25:32,151 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:25:32,151 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:25:32,151 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:25:32,151 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:25:32,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:25:32,152 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:25:32,152 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:25:32,152 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:25:32,152 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:25:32,153 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:25:32,153 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:25:32,153 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:25:32,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:25:32,235 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:25:32,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:25:32,243 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:25:32,243 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:25:32,244 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-30 20:25:32,244 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-30 20:25:32,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:25:32,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:25:32,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:25:32,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:25:32,302 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:25:32,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,339 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:25:32,339 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:25:32,339 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:25:32,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:25:32,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:25:32,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:25:32,342 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:25:32,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... [2018-09-30 20:25:32,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:25:32,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:25:32,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:25:32,365 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:25:32,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:25:32,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:25:32,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:25:32,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:25:32,674 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:25:32,675 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:25:32 BoogieIcfgContainer [2018-09-30 20:25:32,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:25:32,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:25:32,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:25:32,680 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:25:32,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:25:32" (1/2) ... [2018-09-30 20:25:32,682 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 30.09 08:25:32, skipping insertion in model container [2018-09-30 20:25:32,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:25:32" (2/2) ... [2018-09-30 20:25:32,685 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-30 20:25:32,696 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:25:32,705 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:25:32,764 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:25:32,765 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:25:32,766 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:25:32,766 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:25:32,766 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:25:32,766 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:25:32,766 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:25:32,767 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:25:32,767 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:25:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:25:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:25:32,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:32,791 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:25:32,792 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:32,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 20:25:32,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:32,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:32,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:32,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,010 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:25:33,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:25:33,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:25:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:25:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:25:33,035 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:25:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:33,124 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:25:33,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:25:33,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:25:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:33,138 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:25:33,138 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:25:33,142 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 [2018-09-30 20:25:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:25:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:25:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:25:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:25:33,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 20:25:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:33,194 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:25:33,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:25:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:25:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:25:33,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:33,198 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:25:33,198 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:33,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 20:25:33,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:33,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:33,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:33,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:33,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:33,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:33,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:33,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 20:25:33,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:25:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:25:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:25:33,533 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 20:25:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:33,581 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:25:33,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:25:33,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 20:25:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:33,582 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:25:33,582 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:25:33,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:25:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:25:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:25:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:25:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:25:33,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 20:25:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:33,587 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:25:33,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:25:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:25:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:25:33,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:33,588 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 20:25:33,588 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:33,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:33,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 20:25:33,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:33,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:33,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:33,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:33,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:33,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:33,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:33,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:33,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:33,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:33,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 20:25:33,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:25:33,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:25:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:25:33,925 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 20:25:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,056 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:25:34,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:25:34,056 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 20:25:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,057 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:25:34,057 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:25:34,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:25:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:25:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:25:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:25:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:25:34,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 20:25:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,062 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:25:34,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:25:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:25:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:25:34,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,063 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 20:25:34,064 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,064 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 20:25:34,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:34,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:34,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:34,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:25:34,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:34,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 20:25:34,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:25:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:25:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,465 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 20:25:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,523 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:25:34,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:25:34,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 20:25:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,524 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:25:34,525 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:25:34,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:25:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:25:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:25:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:25:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:25:34,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 20:25:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,530 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:25:34,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:25:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:25:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:25:34,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,531 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 20:25:34,531 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 20:25:34,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:34,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:34,708 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:34,714 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:34,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:34,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 20:25:34,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:25:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:25:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:25:34,845 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 20:25:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,911 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:25:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:25:34,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 20:25:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,912 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:25:34,912 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:25:34,913 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 [2018-09-30 20:25:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:25:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:25:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:25:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:25:34,917 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 20:25:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,917 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:25:34,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:25:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:25:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:25:34,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,918 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 20:25:34,918 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 20:25:34,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:35,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:35,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:35,421 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:25:35,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:35,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:35,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 20:25:35,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:25:35,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:25:35,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:25:35,631 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 20:25:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:35,707 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:25:35,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:25:35,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:25:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:35,710 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:25:35,711 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:25:35,711 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 [2018-09-30 20:25:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:25:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:25:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:25:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:25:35,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 20:25:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:35,716 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:25:35,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:25:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:25:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:25:35,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:35,717 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 20:25:35,717 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:35,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 20:25:35,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:35,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:35,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:35,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:35,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:35,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:35,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:35,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:35,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:25:35,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:35,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:36,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 20:25:36,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:25:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:25:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:25:36,038 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 20:25:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:36,103 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:25:36,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:25:36,103 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 20:25:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:36,104 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:25:36,104 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:25:36,105 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 [2018-09-30 20:25:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:25:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:25:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:25:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:25:36,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 20:25:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:36,110 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:25:36,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:25:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:25:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:25:36,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:36,111 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 20:25:36,112 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:36,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:36,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 20:25:36,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:36,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:36,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:36,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:36,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:36,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:36,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 20:25:36,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:25:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:25:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:25:36,652 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 20:25:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:36,710 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:25:36,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:25:36,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 20:25:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:36,712 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:25:36,712 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:25:36,713 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 [2018-09-30 20:25:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:25:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:25:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:25:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:25:36,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 20:25:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:36,717 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:25:36,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:25:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:25:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:25:36,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:36,718 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 20:25:36,719 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:36,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 20:25:36,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:36,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:36,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:36,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:36,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:36,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:36,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:36,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:36,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:37,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:37,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 20:25:37,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:25:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:25:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:25:37,095 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 20:25:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:37,160 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:25:37,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:25:37,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 20:25:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:37,163 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:25:37,164 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:25:37,165 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 [2018-09-30 20:25:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:25:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:25:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:25:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:25:37,169 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 20:25:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:37,169 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:25:37,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:25:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:25:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:25:37,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:37,170 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 20:25:37,170 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:37,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 20:25:37,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:37,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:37,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:37,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:37,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:37,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:37,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:37,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:25:37,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:37,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:37,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:37,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 20:25:37,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:25:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:25:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:25:37,578 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 20:25:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:37,844 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:25:37,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:25:37,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 20:25:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:37,845 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:25:37,846 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:25:37,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:25:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:25:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:25:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:25:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:25:37,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 20:25:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:37,851 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:25:37,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:25:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:25:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:25:37,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:37,853 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 20:25:37,853 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:37,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 20:25:37,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:37,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:37,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:37,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:38,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:38,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:38,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:38,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:38,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:38,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 20:25:38,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:25:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:25:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:25:38,345 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 20:25:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:38,404 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:25:38,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:25:38,404 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 20:25:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:38,405 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:25:38,406 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:25:38,407 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 [2018-09-30 20:25:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:25:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:25:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:25:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:25:38,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 20:25:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:38,413 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:25:38,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:25:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:25:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:25:38,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:38,414 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 20:25:38,414 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:38,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 20:25:38,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:38,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:38,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:38,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:38,582 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:38,593 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:25:38,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:38,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:39,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:39,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 20:25:39,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:25:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:25:39,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:25:39,066 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 20:25:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:39,173 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:25:39,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:25:39,173 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 20:25:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:39,176 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:25:39,176 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:25:39,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:25:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:25:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:25:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:25:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:25:39,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 20:25:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:39,181 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:25:39,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:25:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:25:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:25:39,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:39,183 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 20:25:39,183 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:39,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 20:25:39,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:39,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:39,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:39,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:39,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:39,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:39,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:39,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:39,780 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:25:39,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:39,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:40,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 20:25:40,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:25:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:25:40,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:25:40,025 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 20:25:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:40,093 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:25:40,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:25:40,094 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 20:25:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:40,095 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:25:40,095 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:25:40,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:25:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:25:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:25:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:25:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:25:40,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 20:25:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:40,101 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:25:40,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:25:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:25:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:25:40,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:40,102 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 20:25:40,102 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:40,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:40,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 20:25:40,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:40,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:40,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:40,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:40,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:40,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:40,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:40,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 20:25:40,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:25:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:25:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:25:40,743 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 20:25:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:40,821 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:25:40,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:25:40,822 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 20:25:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:40,822 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:25:40,822 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:25:40,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:25:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:25:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:25:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:25:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:25:40,828 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 20:25:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:40,828 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:25:40,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:25:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:25:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:25:40,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:40,829 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 20:25:40,830 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:40,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 20:25:40,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:40,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:40,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:40,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:41,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:41,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:41,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:41,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:41,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:41,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 20:25:41,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:25:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:25:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:25:41,467 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 20:25:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:41,540 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:25:41,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:25:41,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 20:25:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:41,542 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:25:41,542 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:25:41,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:25:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:25:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:25:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:25:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:25:41,548 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 20:25:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:41,548 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:25:41,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:25:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:25:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:25:41,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:41,549 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 20:25:41,550 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:41,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:41,550 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 20:25:41,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:41,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:41,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:41,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:41,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:41,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:41,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:41,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:25:41,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:41,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:42,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 20:25:42,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:25:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:25:42,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:25:42,387 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 20:25:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:42,513 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:25:42,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:25:42,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 20:25:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:42,515 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:25:42,515 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:25:42,516 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 [2018-09-30 20:25:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:25:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:25:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:25:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:25:42,521 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 20:25:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:42,521 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:25:42,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:25:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:25:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:25:42,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:42,523 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 20:25:42,523 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:42,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:42,523 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 20:25:42,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:42,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:42,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:42,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:42,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:42,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:42,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:42,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:42,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:43,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 20:25:43,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:25:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:25:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:25:43,078 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 20:25:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:43,157 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:25:43,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:25:43,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 20:25:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:43,158 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:25:43,158 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:25:43,159 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 [2018-09-30 20:25:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:25:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:25:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:25:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:25:43,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 20:25:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:43,164 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:25:43,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:25:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:25:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:25:43,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:43,165 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 20:25:43,165 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:43,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 20:25:43,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:43,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:43,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:43,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:43,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:43,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:43,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:43,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:43,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:25:43,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:43,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:44,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:44,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 20:25:44,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:25:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:25:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:25:44,029 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 20:25:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:44,368 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:25:44,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:25:44,369 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 20:25:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:44,369 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:25:44,370 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:25:44,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:25:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:25:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:25:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:25:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:25:44,377 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 20:25:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:44,377 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:25:44,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:25:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:25:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:25:44,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:44,378 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 20:25:44,379 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:44,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 20:25:44,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:44,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:44,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:44,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:44,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:44,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:44,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:44,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:44,964 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:25:44,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:44,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:45,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:45,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 20:25:45,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:25:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:25:45,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:25:45,760 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 20:25:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:45,835 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:25:45,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:25:45,836 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 20:25:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:45,837 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:25:45,837 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:25:45,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:25:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:25:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:25:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:25:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:25:45,843 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 20:25:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:45,844 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:25:45,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:25:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:25:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:25:45,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:45,845 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 20:25:45,845 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:45,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 20:25:45,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:45,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:45,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:45,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:45,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:46,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:46,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:46,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:47,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:47,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 20:25:47,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:25:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:25:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:25:47,038 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 20:25:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:47,188 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:25:47,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:25:47,189 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 20:25:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:47,189 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:25:47,190 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:25:47,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:25:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:25:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:25:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:25:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:25:47,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 20:25:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:47,196 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:25:47,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:25:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:25:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:25:47,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:47,197 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 20:25:47,197 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:47,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 20:25:47,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:47,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:47,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:47,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:47,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:47,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:47,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:47,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:47,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:47,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:47,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:48,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 20:25:48,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:25:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:25:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:25:48,149 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 20:25:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:48,290 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:25:48,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:25:48,291 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 20:25:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:48,292 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:25:48,292 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:25:48,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:25:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:25:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:25:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:25:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:25:48,298 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 20:25:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:48,299 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:25:48,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:25:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:25:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:25:48,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:48,302 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 20:25:48,302 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:48,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 20:25:48,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:48,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:48,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:48,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:49,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:49,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:49,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:49,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:25:49,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:49,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:49,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:49,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 20:25:49,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:25:49,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:25:49,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:25:49,938 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 20:25:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:50,056 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:25:50,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:25:50,058 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 20:25:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:50,059 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:25:50,059 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:25:50,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:25:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:25:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:25:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:25:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:25:50,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 20:25:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:50,065 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:25:50,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:25:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:25:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:25:50,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:50,066 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 20:25:50,066 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:50,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 20:25:50,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:50,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:50,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:50,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:50,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:50,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:50,486 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:50,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:50,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:50,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:51,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 20:25:51,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:25:51,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:25:51,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:25:51,018 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 20:25:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:51,115 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:25:51,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:25:51,116 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 20:25:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:51,117 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:25:51,117 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:25:51,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:25:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:25:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:25:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:25:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:25:51,123 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 20:25:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:51,124 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:25:51,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:25:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:25:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:25:51,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:51,125 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 20:25:51,125 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:51,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 20:25:51,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:51,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:51,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:51,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:51,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:51,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:51,636 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:51,665 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:25:51,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:51,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:52,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 20:25:52,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:25:52,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:25:52,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:25:52,146 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 20:25:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:52,278 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:25:52,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:25:52,279 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 20:25:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:52,279 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:25:52,280 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:25:52,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:25:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:25:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:25:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:25:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:25:52,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 20:25:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:52,286 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:25:52,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:25:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:25:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:25:52,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:52,287 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 20:25:52,287 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:52,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 20:25:52,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:52,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:52,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:52,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:52,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:52,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:52,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:25:52,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:52,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:53,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:53,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 20:25:53,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:25:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:25:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:25:53,177 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 20:25:53,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:53,298 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:25:53,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:25:53,299 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 20:25:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:53,299 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:25:53,300 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:25:53,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:25:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:25:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:25:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:25:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:25:53,305 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 20:25:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:53,305 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:25:53,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:25:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:25:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:25:53,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:53,306 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 20:25:53,306 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:53,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:53,306 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 20:25:53,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:53,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:53,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:53,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:53,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:53,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:53,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:53,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:53,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:54,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 20:25:54,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:25:54,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:25:54,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:25:54,361 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 20:25:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:54,479 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:25:54,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:25:54,479 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 20:25:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:54,480 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:25:54,480 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:25:54,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:25:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:25:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:25:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:25:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:25:54,487 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 20:25:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:54,487 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:25:54,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:25:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:25:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:25:54,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:54,488 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 20:25:54,488 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:54,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 20:25:54,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:54,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:54,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:54,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:55,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:55,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:55,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:55,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:55,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:55,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:55,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:55,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 20:25:55,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:25:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:25:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:25:55,667 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 20:25:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:55,788 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:25:55,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:25:55,788 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 20:25:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:55,789 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:25:55,789 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:25:55,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:25:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:25:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:25:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:25:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:25:55,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 20:25:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:55,795 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:25:55,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:25:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:25:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:25:55,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:55,796 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 20:25:55,796 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:55,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:55,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 20:25:55,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:55,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:55,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:55,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:55,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:56,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:56,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:56,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:25:56,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:56,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:56,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:56,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 20:25:56,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:25:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:25:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:25:56,900 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 20:25:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:57,036 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:25:57,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:25:57,036 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 20:25:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:57,037 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:25:57,037 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:25:57,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:25:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:25:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:25:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:25:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:25:57,042 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 20:25:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:57,043 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:25:57,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:25:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:25:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:25:57,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:57,044 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 20:25:57,044 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:57,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 20:25:57,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:57,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:57,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:57,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:57,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:57,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:57,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:57,576 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:57,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:57,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:59,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:59,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 20:25:59,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:25:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:25:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:25:59,683 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 20:25:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:59,914 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:25:59,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:25:59,914 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 20:25:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:59,915 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:25:59,915 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:25:59,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:25:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:25:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:25:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:25:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:25:59,919 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 20:25:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:59,919 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:25:59,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:25:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:25:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:25:59,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:59,920 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 20:25:59,920 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:59,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 20:25:59,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:59,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:59,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:59,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:59,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:00,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:00,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:00,569 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:00,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:26:00,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:00,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:01,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:01,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 20:26:01,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:26:01,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:26:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:26:01,205 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 20:26:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:01,359 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:26:01,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:26:01,360 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 20:26:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:01,361 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:26:01,361 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:26:01,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:26:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:26:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:26:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:26:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:26:01,365 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 20:26:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:01,366 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:26:01,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:26:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:26:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:26:01,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:01,367 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 20:26:01,367 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:01,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 20:26:01,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:01,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:01,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:01,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:01,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:01,905 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 [2018-09-30 20:26:01,914 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:01,946 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:26:01,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:01,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:02,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:02,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 20:26:02,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:26:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:26:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:26:02,562 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 20:26:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:02,681 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:26:02,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:26:02,681 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 20:26:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:02,682 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:26:02,682 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:26:02,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:26:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:26:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:26:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:26:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:26:02,687 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 20:26:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:02,688 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:26:02,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:26:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:26:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:26:02,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:02,688 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 20:26:02,689 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:02,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 20:26:02,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:02,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:02,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:02,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:02,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:03,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:03,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:03,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:03,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 20:26:03,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:26:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:26:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:26:03,963 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 20:26:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:04,114 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:26:04,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:26:04,114 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 20:26:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:04,115 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:26:04,115 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:26:04,116 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 [2018-09-30 20:26:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:26:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:26:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:26:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:26:04,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 20:26:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:04,121 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:26:04,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:26:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:26:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:26:04,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:04,122 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 20:26:04,122 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:04,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:04,123 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 20:26:04,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:04,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:04,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:04,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:05,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:05,491 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 [2018-09-30 20:26:05,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:05,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:05,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:05,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:06,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:06,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 20:26:06,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:26:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:26:06,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:26:06,317 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 20:26:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:06,442 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:26:06,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:26:06,442 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 20:26:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:06,443 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:26:06,443 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:26:06,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:26:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:26:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:26:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:26:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:26:06,449 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 20:26:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:06,449 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:26:06,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:26:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:26:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:26:06,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:06,450 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 20:26:06,450 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:06,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 20:26:06,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:06,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:06,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:06,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:07,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:07,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:07,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:07,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:26:07,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:07,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:07,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:07,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 20:26:07,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:26:07,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:26:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:26:07,866 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 20:26:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:08,022 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:26:08,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:26:08,023 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 20:26:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:08,023 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:26:08,024 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:26:08,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:26:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:26:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:26:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:26:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:26:08,029 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 20:26:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:08,029 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:26:08,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:26:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:26:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:26:08,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:08,030 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 20:26:08,030 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:08,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:08,031 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 20:26:08,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:08,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:08,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:08,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:08,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:08,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:08,859 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 [2018-09-30 20:26:08,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:08,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:08,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:08,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:09,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:09,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 20:26:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:26:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:26:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:26:09,617 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 20:26:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:09,797 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:26:09,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:26:09,798 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 20:26:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:09,799 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:26:09,799 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:26:09,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:26:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:26:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:26:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:26:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:26:09,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 20:26:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:09,805 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:26:09,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:26:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:26:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:26:09,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:09,805 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 20:26:09,806 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:09,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 20:26:09,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:09,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:09,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:09,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:11,049 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 [2018-09-30 20:26:11,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:11,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:26:11,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:11,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:11,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 20:26:11,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:26:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:26:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:26:11,950 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 20:26:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:12,322 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:26:12,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:26:12,323 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 20:26:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:12,324 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:26:12,324 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:26:12,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:26:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:26:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:26:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:26:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:26:12,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 20:26:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:12,328 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:26:12,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:26:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:26:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:26:12,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:12,329 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 20:26:12,329 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:12,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 20:26:12,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:12,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:12,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:12,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:12,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:13,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:13,145 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 [2018-09-30 20:26:13,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:13,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:26:13,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:13,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:14,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:14,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 20:26:14,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:26:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:26:14,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:26:14,033 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 20:26:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:14,204 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:26:14,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:26:14,204 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 20:26:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:14,205 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:26:14,205 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:26:14,206 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 [2018-09-30 20:26:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:26:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:26:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:26:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:26:14,210 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 20:26:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:14,210 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:26:14,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:26:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:26:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:26:14,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:14,211 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 20:26:14,211 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:14,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 20:26:14,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:14,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:14,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:14,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:14,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:15,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:15,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:15,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:15,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:16,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 20:26:16,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:26:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:26:16,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:26:16,233 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 20:26:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:16,395 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:26:16,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:26:16,395 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 20:26:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:16,396 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:26:16,396 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:26:16,397 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 [2018-09-30 20:26:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:26:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:26:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:26:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:26:16,401 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 20:26:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:16,401 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:26:16,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:26:16,401 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:26:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:26:16,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:16,402 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 20:26:16,402 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:16,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 20:26:16,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:16,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:16,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:16,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:17,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:17,944 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 [2018-09-30 20:26:17,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:17,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:17,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:17,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:18,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 20:26:18,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:26:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:26:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:26:18,883 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 20:26:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:19,049 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:26:19,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:26:19,049 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 20:26:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:19,050 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:26:19,050 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:26:19,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:26:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:26:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:26:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:26:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:26:19,055 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 20:26:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:19,055 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:26:19,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:26:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:26:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:26:19,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:19,056 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 20:26:19,056 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:19,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 20:26:19,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:19,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:19,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:20,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:20,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:20,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:20,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:26:20,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:20,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:21,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:21,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 20:26:21,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:26:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:26:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:26:21,444 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 20:26:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:21,617 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:26:21,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:26:21,618 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 20:26:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:21,619 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:26:21,619 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:26:21,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:26:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:26:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:26:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:26:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:26:21,623 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 20:26:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:21,624 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:26:21,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:26:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:26:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:26:21,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:21,624 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 20:26:21,625 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:21,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 20:26:21,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:21,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:21,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:21,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:22,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:22,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:22,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:22,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:22,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:22,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:23,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:23,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 20:26:23,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:26:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:26:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:26:23,466 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 20:26:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:23,626 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:26:23,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:26:23,626 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 20:26:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:23,627 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:26:23,627 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:26:23,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:26:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:26:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:26:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:26:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:26:23,633 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 20:26:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:23,633 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:26:23,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:26:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:26:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:26:23,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:23,634 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 20:26:23,634 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:23,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 20:26:23,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:23,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:23,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:23,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:23,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:24,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:24,534 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 [2018-09-30 20:26:24,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:24,581 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:26:24,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:24,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:25,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:25,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 20:26:25,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:26:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:26:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:26:25,974 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 20:26:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:26,200 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:26:26,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:26:26,200 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 20:26:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:26,201 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:26:26,201 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:26:26,202 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 [2018-09-30 20:26:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:26:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:26:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:26:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:26:26,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 20:26:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:26,208 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:26:26,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:26:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:26:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:26:26,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:26,209 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 20:26:26,209 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:26,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 20:26:26,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:26,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:26,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:26,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:27,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:27,085 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 [2018-09-30 20:26:27,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:27,132 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:26:27,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:27,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:28,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:28,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 20:26:28,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:26:28,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:26:28,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:26:28,355 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 20:26:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:28,551 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:26:28,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:26:28,551 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 20:26:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:28,552 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:26:28,552 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:26:28,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:26:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:26:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:26:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:26:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:26:28,557 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 20:26:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:28,557 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:26:28,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:26:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:26:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:26:28,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:28,558 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 20:26:28,559 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:28,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 20:26:28,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:28,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:28,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:29,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:29,543 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 [2018-09-30 20:26:29,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:29,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:30,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:30,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 20:26:30,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:26:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:26:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:26:30,970 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 20:26:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:31,145 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:26:31,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:26:31,145 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 20:26:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:31,146 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:26:31,146 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:26:31,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:26:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:26:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:26:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:26:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:26:31,150 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 20:26:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:31,150 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:26:31,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:26:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:26:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:26:31,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:31,151 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 20:26:31,152 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:31,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 20:26:31,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:31,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:31,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:31,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:31,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:32,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:32,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:32,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:32,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:32,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:32,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:34,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:34,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 20:26:34,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:26:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:26:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:26:34,007 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 20:26:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:34,185 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:26:34,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:26:34,185 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 20:26:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:34,186 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:26:34,186 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:26:34,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:26:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:26:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:26:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:26:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:26:34,192 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 20:26:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:34,193 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:26:34,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:26:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:26:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:26:34,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:34,194 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 20:26:34,194 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:34,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:34,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 20:26:34,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:34,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:34,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:35,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:35,257 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 [2018-09-30 20:26:35,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:35,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:26:35,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:35,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:36,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:36,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 20:26:36,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:26:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:26:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:26:36,923 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 20:26:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:37,156 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:26:37,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:26:37,157 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 20:26:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:37,158 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:26:37,158 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:26:37,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:26:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:26:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:26:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:26:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:26:37,163 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 20:26:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:37,163 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:26:37,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:26:37,163 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:26:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:26:37,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:37,164 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 20:26:37,164 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:37,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 20:26:37,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:37,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:37,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:37,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:38,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:38,656 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 [2018-09-30 20:26:38,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:38,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:38,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:38,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:40,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:40,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 20:26:40,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:26:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:26:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:26:40,055 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 20:26:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:40,239 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:26:40,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:26:40,240 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 20:26:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:40,241 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:26:40,241 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:26:40,242 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 [2018-09-30 20:26:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:26:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:26:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:26:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:26:40,246 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 20:26:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:40,246 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:26:40,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:26:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:26:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:26:40,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:40,247 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 20:26:40,247 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:40,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 20:26:40,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:40,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:40,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:40,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:40,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:41,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:41,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:41,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:41,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:26:41,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:41,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:43,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:43,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 20:26:43,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:26:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:26:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:26:43,087 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 20:26:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:43,291 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:26:43,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:26:43,291 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 20:26:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:43,292 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:26:43,293 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:26:43,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:26:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:26:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:26:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:26:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:26:43,298 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 20:26:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:43,298 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:26:43,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:26:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:26:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:26:43,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:43,299 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 20:26:43,299 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:43,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 20:26:43,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:43,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:43,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:43,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:43,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:44,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:44,572 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 [2018-09-30 20:26:44,579 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:44,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:26:44,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:44,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:46,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:46,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 20:26:46,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:26:46,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:26:46,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:26:46,226 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 20:26:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:46,506 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:26:46,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:26:46,507 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 20:26:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:46,508 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:26:46,508 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:26:46,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:26:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:26:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:26:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:26:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:26:46,513 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 20:26:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:46,514 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:26:46,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:26:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:26:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:26:46,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:46,515 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 20:26:46,515 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:46,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 20:26:46,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:46,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:46,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:46,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:46,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:47,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:47,752 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 [2018-09-30 20:26:47,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:47,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:50,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:50,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 20:26:50,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:26:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:26:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:26:50,424 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 20:26:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:50,679 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:26:50,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:26:50,679 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 20:26:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:50,683 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:26:50,683 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:26:50,684 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 [2018-09-30 20:26:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:26:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:26:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:26:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:26:50,689 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 20:26:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:50,689 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:26:50,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:26:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:26:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:26:50,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:50,690 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 20:26:50,691 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:50,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 20:26:50,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:50,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:50,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:50,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:50,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:52,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:52,078 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 [2018-09-30 20:26:52,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:52,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:52,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:52,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:53,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:53,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 20:26:53,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:26:53,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:26:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:26:53,629 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 20:26:55,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:55,057 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:26:55,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:26:55,058 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 20:26:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:55,059 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:26:55,059 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:26:55,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:26:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:26:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:26:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:26:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:26:55,064 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 20:26:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:55,064 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:26:55,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:26:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:26:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:26:55,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:55,065 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 20:26:55,066 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:55,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 20:26:55,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:55,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:55,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:55,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:55,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:56,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:56,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:26:56,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:56,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:26:56,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:56,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:58,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:58,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 20:26:58,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:26:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:26:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:26:58,569 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 20:26:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:58,800 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:26:58,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:26:58,800 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 20:26:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:58,802 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:26:58,802 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:26:58,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:26:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:26:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:26:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:26:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:26:58,808 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 20:26:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:58,808 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:26:58,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:26:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:26:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:26:58,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:58,809 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 20:26:58,809 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:58,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 20:26:58,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:58,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:58,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:58,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:58,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:00,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:00,283 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 [2018-09-30 20:27:00,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:00,343 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:00,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:00,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:02,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:02,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 20:27:02,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:27:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:27:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:27:02,488 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 20:27:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:02,713 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:27:02,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:27:02,713 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 20:27:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:02,714 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:27:02,714 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:27:02,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:27:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:27:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:27:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:27:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:27:02,719 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 20:27:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:02,720 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:27:02,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:27:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:27:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:27:02,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:02,721 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 20:27:02,721 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:02,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 20:27:02,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:02,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:02,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:02,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:02,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:03,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:03,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:27:04,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:04,139 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:27:04,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:04,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:05,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:05,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 20:27:05,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:27:05,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:27:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:27:05,974 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 20:27:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:06,185 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:27:06,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:27:06,185 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 20:27:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:06,187 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:27:06,187 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:27:06,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:27:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:27:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:27:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:27:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:27:06,192 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 20:27:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:06,192 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:27:06,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:27:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:27:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:27:06,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:06,193 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 20:27:06,193 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:06,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 20:27:06,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:06,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:06,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:06,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:06,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:09,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:09,302 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 [2018-09-30 20:27:09,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:09,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:27:09,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:09,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:11,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:11,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 20:27:11,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:27:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:27:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 20:27:11,171 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 20:27:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:11,456 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:27:11,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:27:11,457 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 20:27:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:11,458 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:27:11,458 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:27:11,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 20:27:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:27:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:27:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:27:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:27:11,463 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 20:27:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:11,464 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:27:11,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:27:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:27:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:27:11,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:11,465 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 20:27:11,465 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:11,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 20:27:11,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:11,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:11,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:11,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:11,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:13,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:13,074 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 [2018-09-30 20:27:13,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:13,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:14,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:14,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 20:27:14,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:27:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:27:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:27:14,817 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 20:27:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:15,322 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:27:15,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:27:15,323 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 20:27:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:15,324 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:27:15,324 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:27:15,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:27:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:27:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:27:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:27:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:27:15,330 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 20:27:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:15,330 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:27:15,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:27:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:27:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:27:15,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:15,331 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 20:27:15,332 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:15,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 20:27:15,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:15,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:15,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:15,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:15,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:17,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:17,214 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 [2018-09-30 20:27:17,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:17,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:17,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:17,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:19,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:19,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 20:27:19,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:27:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:27:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 20:27:19,060 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 20:27:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:19,353 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:27:19,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:27:19,354 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 20:27:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:19,355 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:27:19,355 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:27:19,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 20:27:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:27:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:27:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:27:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:27:19,360 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 20:27:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:19,360 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:27:19,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:27:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:27:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:27:19,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:19,361 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 20:27:19,361 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:19,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 20:27:19,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:19,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:19,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:19,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:19,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:20,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:20,846 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 [2018-09-30 20:27:20,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:20,915 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:27:20,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:20,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:23,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:23,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 20:27:23,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:27:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:27:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:27:23,108 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 20:27:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:23,352 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:27:23,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:27:23,352 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 20:27:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:23,353 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:27:23,353 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:27:23,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:27:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:27:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:27:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:27:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:27:23,358 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 20:27:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:23,359 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:27:23,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:27:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:27:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:27:23,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:23,359 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 20:27:23,360 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:23,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 20:27:23,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:23,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:23,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:23,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:23,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:25,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:25,945 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 [2018-09-30 20:27:25,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:25,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:25,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:25,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:28,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:28,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 20:27:28,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:27:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:27:28,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:27:28,375 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 20:27:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:28,652 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:27:28,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:27:28,652 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 20:27:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:28,653 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:27:28,653 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:27:28,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:27:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:27:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:27:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:27:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:27:28,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 20:27:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:28,659 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:27:28,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:27:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:27:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:27:28,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:28,660 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 20:27:28,660 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:28,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 20:27:28,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:28,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:28,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:28,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:30,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:30,329 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 [2018-09-30 20:27:30,336 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:30,401 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:27:30,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:30,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:32,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:32,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 20:27:32,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:27:32,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:27:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:27:32,710 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 20:27:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:32,971 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:27:32,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:27:32,971 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 20:27:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:32,972 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:27:32,972 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:27:32,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:27:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:27:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:27:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:27:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:27:32,978 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 20:27:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:32,978 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:27:32,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:27:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:27:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:27:32,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:32,979 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 20:27:32,979 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:32,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 20:27:32,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:32,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:32,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:32,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:32,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:34,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:34,652 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 [2018-09-30 20:27:34,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:34,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:27:34,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:34,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:36,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:36,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 20:27:36,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:27:36,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:27:36,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 20:27:36,794 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 20:27:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:37,040 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:27:37,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:27:37,040 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 20:27:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:37,041 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:27:37,041 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:27:37,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 20:27:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:27:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:27:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:27:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:27:37,047 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 20:27:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:37,048 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:27:37,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:27:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:27:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:27:37,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:37,049 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 20:27:37,049 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:37,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 20:27:37,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:37,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:37,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:37,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:37,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:38,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:38,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:27:39,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:39,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:41,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:41,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 20:27:41,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:27:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:27:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 20:27:41,153 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 20:27:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:41,449 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:27:41,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:27:41,450 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 20:27:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:41,451 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:27:41,451 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:27:41,452 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 [2018-09-30 20:27:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:27:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:27:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:27:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:27:41,455 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 20:27:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:41,455 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:27:41,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:27:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:27:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:27:41,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:41,456 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 20:27:41,456 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:41,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:41,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 20:27:41,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:41,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:41,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:41,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:41,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:43,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:43,488 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 [2018-09-30 20:27:43,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:43,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:43,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:43,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:45,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:45,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 20:27:45,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:27:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:27:45,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 20:27:45,721 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 20:27:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:45,970 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:27:45,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:27:45,971 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 20:27:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:45,972 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:27:45,972 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:27:45,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 20:27:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:27:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:27:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:27:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:27:45,977 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 20:27:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:45,977 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:27:45,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:27:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:27:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:27:45,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:45,978 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 20:27:45,978 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:45,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 20:27:45,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:45,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:45,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:45,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:45,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:47,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:47,970 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 [2018-09-30 20:27:47,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:48,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:27:48,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:48,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:50,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:50,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 20:27:50,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:27:50,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:27:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:27:50,279 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 20:27:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:50,576 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:27:50,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:27:50,577 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 20:27:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:50,578 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:27:50,578 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:27:50,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:27:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:27:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:27:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:27:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:27:50,583 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 20:27:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:50,584 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:27:50,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:27:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:27:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:27:50,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:50,585 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 20:27:50,585 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:50,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 20:27:50,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:50,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:50,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:50,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:50,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:52,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:52,440 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 [2018-09-30 20:27:52,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:52,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:52,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:52,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:54,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:54,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 20:27:54,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:27:54,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:27:54,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 20:27:54,977 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 20:27:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:55,238 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:27:55,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:27:55,238 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 20:27:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:55,239 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:27:55,239 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:27:55,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 20:27:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:27:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:27:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:27:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:27:55,244 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 20:27:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:55,245 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:27:55,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:27:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:27:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:27:55,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:55,246 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 20:27:55,246 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:55,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 20:27:55,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:55,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:55,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:55,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:55,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:57,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:57,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:27:57,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:57,222 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:27:57,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:57,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:00,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:00,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 20:28:00,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:28:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:28:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:28:00,864 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 20:28:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:01,203 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:28:01,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:28:01,203 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 20:28:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:01,204 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:28:01,205 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:28:01,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:28:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:28:01,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:28:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:28:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:28:01,211 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 20:28:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:01,211 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:28:01,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:28:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:28:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:28:01,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:01,212 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 20:28:01,212 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:01,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:01,212 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 20:28:01,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:01,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:01,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:01,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:01,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:03,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:03,437 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 [2018-09-30 20:28:03,445 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:03,515 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:28:03,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:03,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:06,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:06,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 20:28:06,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:28:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:28:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 20:28:06,045 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 20:28:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:06,360 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:28:06,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:28:06,360 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 20:28:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:06,361 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:28:06,361 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:28:06,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 20:28:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:28:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:28:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:28:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:28:06,366 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 20:28:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:06,366 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:28:06,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:28:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:28:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:28:06,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:06,367 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 20:28:06,367 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:06,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 20:28:06,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:06,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:06,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:06,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:06,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:08,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:08,611 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 [2018-09-30 20:28:08,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:08,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:11,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:11,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 20:28:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:28:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:28:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:28:11,167 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 20:28:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:11,496 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:28:11,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:28:11,496 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 20:28:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:11,497 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:28:11,497 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:28:11,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:28:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:28:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:28:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:28:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:28:11,503 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 20:28:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:11,503 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:28:11,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:28:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:28:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:28:11,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:11,504 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 20:28:11,504 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:11,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 20:28:11,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:11,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:11,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:11,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:13,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:13,905 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 [2018-09-30 20:28:13,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:13,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:13,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:13,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:16,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 20:28:16,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:28:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:28:16,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 20:28:16,476 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 20:28:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:16,804 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:28:16,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:28:16,805 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 20:28:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:16,805 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:28:16,805 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:28:16,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 20:28:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:28:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:28:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:28:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:28:16,811 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 20:28:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:16,811 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:28:16,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:28:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:28:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:28:16,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:16,812 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 20:28:16,812 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:16,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 20:28:16,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:16,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:16,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:16,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:19,146 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 [2018-09-30 20:28:19,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:19,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:28:19,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:19,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:21,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 20:28:21,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:28:21,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:28:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 20:28:21,839 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 20:28:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:22,215 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:28:22,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:28:22,216 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 20:28:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:22,217 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:28:22,217 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:28:22,219 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 [2018-09-30 20:28:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:28:22,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:28:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:28:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:28:22,223 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 20:28:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:22,224 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:28:22,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:28:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:28:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:28:22,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:22,225 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 20:28:22,225 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:22,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 20:28:22,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:22,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:22,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:22,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:22,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:24,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:24,663 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 [2018-09-30 20:28:24,671 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:24,711 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:24,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:24,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:27,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 20:28:27,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:28:27,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:28:27,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 20:28:27,659 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 20:28:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:28,037 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:28:28,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:28:28,038 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 20:28:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:28,039 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:28:28,039 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:28:28,040 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 [2018-09-30 20:28:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:28:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:28:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:28:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:28:28,045 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 20:28:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:28,045 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:28:28,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:28:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:28:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:28:28,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:28,046 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 20:28:28,046 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:28,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 20:28:28,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:28,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:30,599 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 [2018-09-30 20:28:30,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:30,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:28:30,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:30,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:34,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:34,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 20:28:34,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:28:34,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:28:34,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 20:28:34,054 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 20:28:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:34,438 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:28:34,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:28:34,439 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 20:28:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:34,440 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:28:34,440 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:28:34,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 20:28:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:28:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:28:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:28:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:28:34,447 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 20:28:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:34,448 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:28:34,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:28:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:28:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:28:34,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:34,449 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 20:28:34,449 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:34,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 20:28:34,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:34,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:34,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:34,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:36,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:36,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:37,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:28:37,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:37,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:40,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:40,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 20:28:40,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:28:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:28:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 20:28:40,269 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 20:28:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:40,863 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:28:40,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:28:40,864 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 20:28:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:40,865 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:28:40,865 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:28:40,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 20:28:40,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:28:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:28:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:28:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:28:40,871 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 20:28:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:40,871 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:28:40,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:28:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:28:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:28:40,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:40,872 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 20:28:40,872 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:40,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 20:28:40,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:40,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:40,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:40,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:40,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:43,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:43,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:43,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:43,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:46,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 20:28:46,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:28:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:28:46,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 20:28:46,643 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 20:28:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:47,050 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:28:47,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:28:47,051 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 20:28:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:47,052 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:28:47,052 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:28:47,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 20:28:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:28:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:28:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:28:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:28:47,059 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 20:28:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:47,060 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:28:47,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:28:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:28:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:28:47,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:47,061 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 20:28:47,061 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:47,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:47,062 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 20:28:47,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:47,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:47,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:49,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:49,768 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 [2018-09-30 20:28:49,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:49,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:49,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:49,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:52,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:52,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 20:28:52,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:28:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:28:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 20:28:52,906 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 20:28:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:53,338 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:28:53,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:28:53,339 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 20:28:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:53,340 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:28:53,340 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:28:53,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 20:28:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:28:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:28:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:28:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 20:28:53,344 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 20:28:53,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:53,344 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 20:28:53,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 20:28:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 20:28:53,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:28:53,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:53,345 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 20:28:53,345 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:53,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:53,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 20:28:53,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:53,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:53,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:53,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:53,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:56,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:56,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:28:56,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:56,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:28:56,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:56,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:59,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:59,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 20:28:59,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 20:28:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 20:28:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 20:28:59,580 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 20:28:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:59,992 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:28:59,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:28:59,993 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 20:28:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:59,994 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:28:59,994 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:28:59,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 20:28:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:28:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:28:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:28:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 20:28:59,999 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 20:28:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:59,999 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 20:28:59,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 20:28:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 20:29:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:29:00,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:00,000 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 20:29:00,000 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:00,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 20:29:00,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:00,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:00,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:00,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:00,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:02,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:02,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:29:02,536 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:02,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:02,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:02,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:06,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:06,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 20:29:06,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 20:29:06,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 20:29:06,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 20:29:06,053 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 20:29:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:06,401 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:29:06,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:29:06,402 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 20:29:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:06,403 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:29:06,403 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:29:06,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 20:29:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:29:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:29:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:29:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 20:29:06,407 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 20:29:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:06,407 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 20:29:06,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 20:29:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 20:29:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:29:06,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:06,408 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 20:29:06,408 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:06,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 20:29:06,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:06,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:06,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:09,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:09,019 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 [2018-09-30 20:29:09,028 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:09,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:29:09,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:09,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:12,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:12,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 20:29:12,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 20:29:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 20:29:12,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 20:29:12,655 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 20:29:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:13,043 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:29:13,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:29:13,043 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 20:29:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:13,045 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:29:13,045 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:29:13,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 20:29:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:29:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:29:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:29:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 20:29:13,052 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 20:29:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:13,052 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 20:29:13,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 20:29:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 20:29:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:29:13,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:13,053 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 20:29:13,053 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:13,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 20:29:13,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:13,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:13,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:15,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:15,966 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 [2018-09-30 20:29:15,973 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:16,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:29:16,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:16,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:19,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:19,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 20:29:19,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 20:29:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 20:29:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 20:29:19,408 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 20:29:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:19,909 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:29:19,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:29:19,909 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 20:29:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:19,911 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:29:19,911 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:29:19,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 20:29:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:29:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 20:29:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 20:29:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 20:29:19,917 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 20:29:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:19,917 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 20:29:19,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 20:29:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 20:29:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:29:19,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:19,918 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 20:29:19,919 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:19,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 20:29:19,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:19,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:19,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:19,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:19,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:22,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:22,619 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 [2018-09-30 20:29:22,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:22,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:26,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:26,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 20:29:26,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 20:29:26,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 20:29:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 20:29:26,249 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 20:29:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:26,646 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:29:26,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:29:26,647 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 20:29:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:26,648 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:29:26,648 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:29:26,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 20:29:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:29:26,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:29:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:29:26,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 20:29:26,655 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 20:29:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:26,655 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 20:29:26,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 20:29:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 20:29:26,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:29:26,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:26,657 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 20:29:26,657 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:26,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 20:29:26,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:26,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:26,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:26,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:26,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:29,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:29,523 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 [2018-09-30 20:29:29,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:29,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:29,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:29,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-30 20:29:30,906 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 20:29:31,107 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:31,107 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:29:31,113 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:29:31,113 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:29:31 BoogieIcfgContainer [2018-09-30 20:29:31,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:29:31,114 INFO L168 Benchmark]: Toolchain (without parser) took 238815.43 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 367.1 MB). Peak memory consumption was 344.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:29:31,115 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:29:31,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:29:31,116 INFO L168 Benchmark]: Boogie Preprocessor took 21.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:29:31,116 INFO L168 Benchmark]: RCFGBuilder took 311.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:29:31,117 INFO L168 Benchmark]: TraceAbstraction took 238436.93 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 345.9 MB). Peak memory consumption was 322.8 MB. Max. memory is 7.1 GB. [2018-09-30 20:29:31,119 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 311.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238436.93 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 345.9 MB). Peak memory consumption was 322.8 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 164 with TraceHistMax 81, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 126 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 238.3s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 18.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 202.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 206.9s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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-0-2018-09-30_20-29-31-135.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-29-31-135.csv Completed graceful shutdown