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/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:52:37,154 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:52:37,156 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:52:37,171 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:52:37,172 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:52:37,173 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:52:37,174 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:52:37,176 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:52:37,178 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:52:37,178 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:52:37,179 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:52:37,203 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 23:52:37,231 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:52:37,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:52:37,232 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:52:37,233 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:52:37,233 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:52:37,234 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:52:37,234 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:52:37,234 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:52:37,235 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:52:37,235 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:52:37,235 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:52:37,235 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:52:37,235 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:52:37,236 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:52:37,236 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:52:37,236 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:52:37,236 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:52:37,237 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:52:37,238 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:52:37,238 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:52:37,238 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:52:37,238 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:52:37,239 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:52:37,239 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:52:37,239 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:52:37,239 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:52:37,240 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:52:37,240 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:52:37,240 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:52:37,240 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:52:37,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:52:37,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:52:37,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:52:37,319 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:52:37,319 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:52:37,320 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-30 23:52:37,320 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-30 23:52:37,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:52:37,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:52:37,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:52:37,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:52:37,376 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:52:37,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,415 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:52:37,416 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:52:37,416 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:52:37,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:52:37,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:52:37,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:52:37,420 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:52:37,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/1) ... [2018-09-30 23:52:37,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:52:37,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:52:37,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:52:37,445 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:52:37,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (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 23:52:37,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:52:37,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:52:37,683 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:52:37,683 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:52:37 BoogieIcfgContainer [2018-09-30 23:52:37,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:52:37,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:52:37,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:52:37,688 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:52:37,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:52:37" (1/2) ... [2018-09-30 23:52:37,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d630e5 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:52:37, skipping insertion in model container [2018-09-30 23:52:37,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:52:37" (2/2) ... [2018-09-30 23:52:37,692 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-30 23:52:37,701 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:52:37,709 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:52:37,760 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:52:37,761 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:52:37,761 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:52:37,761 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:52:37,762 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:52:37,762 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:52:37,762 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:52:37,762 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:52:37,762 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:52:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:52:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:52:37,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:37,784 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:52:37,786 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:37,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 23:52:37,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:37,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:37,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:37,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:37,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:37,944 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 23:52:37,946 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:52:37,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 23:52:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:52:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:52:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:52:37,966 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:52:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:38,035 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:52:38,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:52:38,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:52:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:38,059 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:52:38,059 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:52:38,071 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 23:52:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:52:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:52:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:52:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:52:38,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 23:52:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:38,149 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:52:38,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:52:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:52:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:52:38,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:38,150 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:52:38,150 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:38,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 23:52:38,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:38,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:38,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:38,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:38,215 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 23:52:38,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:38,216 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 23:52:38,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:38,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:38,565 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 23:52:38,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:38,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 23:52:38,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:52:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:52:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:52:38,599 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 23:52:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:38,708 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:52:38,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:52:38,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 23:52:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:38,710 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:52:38,710 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:52:38,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:52:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:52:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:52:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:52:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:52:38,717 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 23:52:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:38,717 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:52:38,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:52:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:52:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:52:38,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:38,718 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 23:52:38,719 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:38,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 23:52:38,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:38,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:38,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:38,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:38,815 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 23:52:38,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:38,816 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 23:52:38,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:38,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:38,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:38,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:38,993 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 23:52:39,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:39,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 23:52:39,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:52:39,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:52:39,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:52:39,016 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 23:52:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:39,119 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:52:39,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:52:39,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 23:52:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:39,121 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:52:39,121 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:52:39,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:52:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:52:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:52:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:52:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:52:39,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 23:52:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:39,126 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:52:39,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:52:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:52:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:52:39,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:39,127 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 23:52:39,127 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:39,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:39,127 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 23:52:39,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:39,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:39,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:39,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:39,394 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 23:52:39,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:39,395 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 23:52:39,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:39,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:52:39,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:39,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:39,531 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 23:52:39,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:39,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 23:52:39,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:52:39,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:52:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:52:39,554 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 23:52:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:39,604 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:52:39,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:52:39,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 23:52:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:39,605 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:52:39,606 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:52:39,608 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 23:52:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:52:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:52:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:52:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:52:39,612 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 23:52:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:39,613 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:52:39,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:52:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:52:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:52:39,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:39,614 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 23:52:39,614 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:39,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 23:52:39,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:39,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:39,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:39,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:39,779 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 23:52:39,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:39,780 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 23:52:39,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:39,801 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:39,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:39,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:39,926 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 23:52:39,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:39,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 23:52:39,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:52:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:52:39,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:52:39,948 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 23:52:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:40,094 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:52:40,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:52:40,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 23:52:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:40,095 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:52:40,095 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:52:40,096 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 23:52:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:52:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:52:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:52:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:52:40,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 23:52:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:40,100 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:52:40,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:52:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:52:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:52:40,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:40,101 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 23:52:40,101 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:40,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:40,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 23:52:40,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:40,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:40,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:40,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:40,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:40,497 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 23:52:40,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:40,498 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 23:52:40,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:40,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:52:40,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:40,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:40,665 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 23:52:40,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:40,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 23:52:40,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:52:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:52:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:52:40,688 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 23:52:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:40,790 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:52:40,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:52:40,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:52:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:40,794 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:52:40,795 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:52:40,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:52:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:52:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:52:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:52:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:52:40,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 23:52:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:40,800 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:52:40,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:52:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:52:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:52:40,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:40,801 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 23:52:40,801 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:40,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 23:52:40,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:40,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:40,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:40,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:40,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:40,922 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 23:52:40,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:40,923 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 23:52:40,935 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:40,943 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:52:40,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:40,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:41,108 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 23:52:41,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:41,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 23:52:41,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:52:41,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:52:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:52:41,135 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 23:52:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:41,192 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:52:41,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:52:41,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 23:52:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:41,194 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:52:41,194 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:52:41,195 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 23:52:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:52:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:52:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:52:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:52:41,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 23:52:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:41,200 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:52:41,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:52:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:52:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:52:41,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:41,201 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 23:52:41,202 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:41,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:41,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 23:52:41,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:41,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:41,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:41,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:41,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:41,387 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 23:52:41,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:41,388 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 23:52:41,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:41,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:41,704 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 23:52:41,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:41,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 23:52:41,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:52:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:52:41,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:52:41,729 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 23:52:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:41,781 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:52:41,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:52:41,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 23:52:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:41,783 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:52:41,784 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:52:41,785 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 23:52:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:52:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:52:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:52:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:52:41,789 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 23:52:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:41,789 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:52:41,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:52:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:52:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:52:41,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:41,790 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 23:52:41,791 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:41,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 23:52:41,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:41,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:41,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:41,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:41,908 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 23:52:41,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:41,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:41,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:41,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:41,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:41,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:42,077 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 23:52:42,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:42,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 23:52:42,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:52:42,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:52:42,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:52:42,100 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 23:52:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,163 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:52:42,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:52:42,163 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 23:52:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,165 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:52:42,165 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:52:42,166 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 23:52:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:52:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:52:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:52:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:52:42,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 23:52:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,171 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:52:42,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:52:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:52:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:52:42,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,172 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 23:52:42,172 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 23:52:42,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:42,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:42,320 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 23:52:42,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:42,321 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 23:52:42,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:42,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:52:42,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:42,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:42,578 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 23:52:42,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:42,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 23:52:42,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:52:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:52:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:52:42,601 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 23:52:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:42,872 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:52:42,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:52:42,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 23:52:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:42,873 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:52:42,873 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:52:42,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:52:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:52:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:52:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:52:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:52:42,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 23:52:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:42,879 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:52:42,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:52:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:52:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:52:42,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:42,880 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 23:52:42,880 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:42,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 23:52:42,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:42,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:42,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:42,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:43,127 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 23:52:43,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:43,128 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 23:52:43,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:43,144 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:43,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:43,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:43,368 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 23:52:43,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:43,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 23:52:43,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:52:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:52:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:52:43,390 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 23:52:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:43,724 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:52:43,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:52:43,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 23:52:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:43,725 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:52:43,725 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:52:43,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:52:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:52:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:52:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:52:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:52:43,732 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 23:52:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:43,733 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:52:43,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:52:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:52:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:52:43,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:43,734 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 23:52:43,734 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:43,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:43,734 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 23:52:43,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:43,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:43,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:43,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:43,908 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 23:52:43,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:43,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:43,917 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:43,930 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:52:43,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:43,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:44,329 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 23:52:44,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:44,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 23:52:44,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:52:44,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:52:44,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:52:44,352 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 23:52:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:44,454 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:52:44,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:52:44,455 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 23:52:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:44,456 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:52:44,456 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:52:44,457 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 23:52:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:52:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:52:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:52:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:52:44,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 23:52:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:44,462 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:52:44,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:52:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:52:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:52:44,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:44,463 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 23:52:44,463 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:44,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 23:52:44,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:44,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:44,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:44,809 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 23:52:44,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:44,810 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 23:52:44,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:44,852 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:52:44,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:44,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:45,167 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 23:52:45,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:45,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 23:52:45,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:52:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:52:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:52:45,191 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 23:52:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:45,278 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:52:45,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:52:45,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 23:52:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:45,279 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:52:45,279 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:52:45,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:52:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:52:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:52:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:52:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:52:45,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 23:52:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:45,285 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:52:45,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:52:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:52:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:52:45,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:45,286 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 23:52:45,286 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:45,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 23:52:45,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:45,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:45,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:45,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:45,513 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 23:52:45,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:45,513 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 23:52:45,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:45,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:45,841 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 23:52:45,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:45,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 23:52:45,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:52:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:52:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:52:45,865 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 23:52:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:45,948 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:52:45,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:52:45,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 23:52:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:45,948 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:52:45,949 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:52:45,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:52:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:52:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:52:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:52:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:52:45,953 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 23:52:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:45,954 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:52:45,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:52:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:52:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:52:45,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:45,955 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 23:52:45,955 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:45,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:45,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 23:52:45,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:45,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:45,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:45,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:46,191 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 23:52:46,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:46,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:46,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:46,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:46,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:46,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:46,573 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 23:52:46,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:46,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 23:52:46,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:52:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:52:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:52:46,595 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 23:52:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:46,693 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:52:46,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:52:46,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 23:52:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:46,695 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:52:46,695 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:52:46,696 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 23:52:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:52:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:52:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:52:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:52:46,701 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 23:52:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:46,701 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:52:46,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:52:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:52:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:52:46,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:46,702 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 23:52:46,702 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:46,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 23:52:46,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:46,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:46,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:46,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:46,901 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 23:52:46,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:46,902 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 23:52:46,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:47,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:52:47,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:47,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:47,508 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 23:52:47,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:47,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 23:52:47,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:52:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:52:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:52:47,529 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 23:52:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:47,660 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:52:47,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:52:47,660 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 23:52:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:47,661 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:52:47,661 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:52:47,662 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 23:52:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:52:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:52:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:52:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:52:47,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 23:52:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:47,666 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:52:47,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:52:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:52:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:52:47,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:47,667 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 23:52:47,667 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:47,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 23:52:47,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:47,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:47,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:47,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:48,056 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 23:52:48,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:48,056 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 23:52:48,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:48,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:48,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:48,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:48,342 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 23:52:48,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:48,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 23:52:48,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:52:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:52:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:52:48,364 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 23:52:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:48,440 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:52:48,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:52:48,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 23:52:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:48,441 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:52:48,442 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:52:48,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:52:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:52:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:52:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:52:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:52:48,447 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 23:52:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:48,447 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:52:48,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:52:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:52:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:52:48,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:48,448 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 23:52:48,448 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:48,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 23:52:48,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:48,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:48,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:48,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:48,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:48,849 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 23:52:48,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:48,849 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 23:52:48,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:48,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:52:48,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:48,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:49,410 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 23:52:49,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:49,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 23:52:49,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:52:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:52:49,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:52:49,432 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 23:52:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:49,735 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:52:49,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:52:49,735 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 23:52:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:49,736 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:52:49,737 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:52:49,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:52:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:52:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:52:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:52:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:52:49,742 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 23:52:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:49,743 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:52:49,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:52:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:52:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:52:49,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:49,744 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 23:52:49,744 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:49,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 23:52:49,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:49,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:49,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:49,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:50,053 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 23:52:50,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:50,054 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 23:52:50,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:50,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:52:50,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:50,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:50,635 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 23:52:50,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:50,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 23:52:50,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:52:50,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:52:50,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:52:50,657 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 23:52:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:50,748 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:52:50,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:52:50,749 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 23:52:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:50,750 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:52:50,750 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:52:50,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:52:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:52:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:52:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:52:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:52:50,755 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 23:52:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:50,755 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:52:50,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:52:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:52:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:52:50,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:50,756 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 23:52:50,756 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:50,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 23:52:50,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:50,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:50,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:50,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:51,042 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 23:52:51,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:51,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:52:51,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:51,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:51,573 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 23:52:51,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:51,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 23:52:51,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:52:51,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:52:51,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:52:51,595 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 23:52:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:51,738 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:52:51,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:52:51,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 23:52:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:51,739 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:52:51,739 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:52:51,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:52:51,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:52:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:52:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:52:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:52:51,746 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 23:52:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:51,746 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:52:51,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:52:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:52:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:52:51,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:51,747 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 23:52:51,747 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:51,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 23:52:51,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:51,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:51,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:51,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:51,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:52,307 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 23:52:52,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:52,308 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 23:52:52,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:52,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:52,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:52,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:52,649 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 23:52:52,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:52,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 23:52:52,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:52:52,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:52:52,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:52:52,674 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 23:52:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:52,811 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:52:52,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:52:52,811 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 23:52:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:52,811 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:52:52,812 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:52:52,812 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 23:52:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:52:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:52:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:52:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:52:52,817 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 23:52:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:52,817 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:52:52,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:52:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:52:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:52:52,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:52,818 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 23:52:52,819 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:52,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 23:52:52,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:52,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:52,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:52,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:52,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:53,399 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 23:52:53,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:53,399 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 23:52:53,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:53,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:52:53,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:53,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:53,784 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 23:52:53,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:53,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 23:52:53,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:52:53,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:52:53,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:52:53,805 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 23:52:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:53,929 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:52:53,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:52:53,932 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 23:52:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:53,933 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:52:53,933 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:52:53,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:52:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:52:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:52:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:52:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:52:53,939 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 23:52:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:53,939 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:52:53,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:52:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:52:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:52:53,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:53,940 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 23:52:53,940 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:53,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:53,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 23:52:53,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:53,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:53,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:53,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:53,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:54,795 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 23:52:54,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:54,795 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 23:52:54,803 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:54,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:54,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:54,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:55,364 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 23:52:55,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:55,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 23:52:55,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:52:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:52:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:52:55,388 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 23:52:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:55,480 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:52:55,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:52:55,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 23:52:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:55,481 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:52:55,481 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:52:55,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:52:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:52:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:52:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:52:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:52:55,487 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 23:52:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:55,488 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:52:55,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:52:55,488 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:52:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:52:55,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:55,489 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 23:52:55,489 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:55,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 23:52:55,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:55,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:55,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:55,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:55,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:56,268 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 23:52:56,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:56,269 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 23:52:56,276 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:56,296 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:52:56,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:56,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:56,723 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 23:52:56,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:56,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 23:52:56,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:52:56,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:52:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:52:56,745 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 23:52:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:56,869 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:52:56,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:52:56,870 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 23:52:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:56,871 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:52:56,871 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:52:56,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:52:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:52:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:52:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:52:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:52:56,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 23:52:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:56,876 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:52:56,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:52:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:52:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:52:56,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:56,877 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 23:52:56,877 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:56,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 23:52:56,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:56,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:56,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:57,299 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 23:52:57,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:57,300 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 23:52:57,307 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:57,329 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:52:57,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:57,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:57,774 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 23:52:57,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:57,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 23:52:57,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:52:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:52:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:52:57,797 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 23:52:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:57,988 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:52:57,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:52:57,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 23:52:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:57,989 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:52:57,989 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:52:57,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:52:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:52:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:52:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:52:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:52:57,992 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 23:52:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:57,993 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:52:57,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:52:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:52:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:52:57,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:57,993 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 23:52:57,993 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:57,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:57,994 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 23:52:57,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:57,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:57,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:57,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:57,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:58,485 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 23:52:58,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:58,485 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 23:52:58,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:58,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:58,972 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 23:52:58,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:58,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 23:52:58,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:52:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:52:58,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:52:58,994 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 23:52:59,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:59,115 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:52:59,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:52:59,116 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 23:52:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:59,116 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:52:59,117 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:52:59,118 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 23:52:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:52:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:52:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:52:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:52:59,124 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 23:52:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:59,125 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:52:59,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:52:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:52:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:52:59,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:59,126 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 23:52:59,126 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:59,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:59,126 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 23:52:59,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:59,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:59,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:59,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:59,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:59,580 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 23:52:59,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:59,581 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 23:52:59,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:59,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:59,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:59,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:00,163 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 23:53:00,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:00,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 23:53:00,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:53:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:53:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:00,185 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 23:53:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:00,324 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:53:00,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:53:00,324 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 23:53:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:00,325 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:53:00,325 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:53:00,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:53:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:53:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:53:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:53:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:53:00,330 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 23:53:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:00,331 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:53:00,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:53:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:53:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:53:00,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:00,332 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 23:53:00,332 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:00,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 23:53:00,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:00,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:00,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:00,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:00,801 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 23:53:00,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:00,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:00,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:00,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:53:00,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:00,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:01,319 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 23:53:01,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:01,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 23:53:01,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:53:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:53:01,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:53:01,341 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 23:53:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:01,451 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:53:01,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:53:01,452 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 23:53:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:01,452 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:53:01,452 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:53:01,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:53:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:53:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:53:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:53:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:53:01,456 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 23:53:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:01,456 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:53:01,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:53:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:53:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:53:01,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:01,457 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 23:53:01,457 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:01,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 23:53:01,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:01,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:01,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:01,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:01,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:01,934 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 23:53:01,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:01,934 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 23:53:01,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:01,987 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:01,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:01,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:03,366 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 23:53:03,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:03,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 23:53:03,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:53:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:53:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:53:03,387 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 23:53:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:03,593 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:53:03,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:53:03,594 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 23:53:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:03,595 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:53:03,595 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:53:03,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:53:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:53:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:53:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:53:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:53:03,599 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 23:53:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:03,599 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:53:03,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:53:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:53:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:53:03,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:03,600 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 23:53:03,600 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:03,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 23:53:03,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:03,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:03,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:03,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:03,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:04,108 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 23:53:04,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:04,108 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 23:53:04,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:04,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:53:04,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:04,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:04,722 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 23:53:04,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:04,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 23:53:04,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:53:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:53:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:04,744 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 23:53:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:04,915 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:53:04,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:53:04,916 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 23:53:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:04,917 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:53:04,917 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:53:04,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:53:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:53:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:53:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:53:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:53:04,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 23:53:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:04,922 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:53:04,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:53:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:53:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:53:04,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:04,923 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 23:53:04,923 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:04,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 23:53:04,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:04,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:04,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:04,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:04,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:05,625 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 23:53:05,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:05,626 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 23:53:05,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:05,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:53:05,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:05,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:06,289 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 23:53:06,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:06,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 23:53:06,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:53:06,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:53:06,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:06,310 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 23:53:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:06,428 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:53:06,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:53:06,428 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 23:53:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:06,429 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:53:06,429 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:53:06,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:53:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:53:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:53:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:53:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:53:06,434 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 23:53:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:06,434 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:53:06,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:53:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:53:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:53:06,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:06,435 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 23:53:06,436 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:06,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 23:53:06,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:06,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:06,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:06,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:06,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:07,008 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 23:53:07,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:07,008 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 23:53:07,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:07,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:07,706 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 23:53:07,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:07,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 23:53:07,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:53:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:53:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:53:07,727 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 23:53:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:07,885 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:53:07,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:53:07,885 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 23:53:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:07,886 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:53:07,886 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:53:07,888 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 23:53:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:53:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:53:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:53:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:53:07,891 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 23:53:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:07,891 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:53:07,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:53:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:53:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:53:07,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:07,892 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 23:53:07,892 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:07,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 23:53:07,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:07,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:07,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:07,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:07,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:08,775 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 23:53:08,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:08,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:08,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:08,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:08,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:08,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:09,515 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 23:53:09,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:09,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 23:53:09,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:53:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:53:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:53:09,536 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 23:53:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:09,695 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:53:09,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:53:09,695 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 23:53:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:09,696 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:53:09,696 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:53:09,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:53:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:53:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:53:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:53:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:53:09,701 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 23:53:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:09,702 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:53:09,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:53:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:53:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:53:09,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:09,702 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 23:53:09,702 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:09,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:09,703 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 23:53:09,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:09,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:09,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:09,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:09,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:10,437 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 23:53:10,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:10,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:10,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:10,481 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:53:10,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:10,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:11,217 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 23:53:11,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:11,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 23:53:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:53:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:53:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:53:11,239 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 23:53:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:11,440 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:53:11,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:53:11,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 23:53:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:11,442 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:53:11,442 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:53:11,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:53:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:53:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:53:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:53:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:53:11,445 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 23:53:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:11,446 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:53:11,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:53:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:53:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:53:11,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:11,446 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 23:53:11,446 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:11,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 23:53:11,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:11,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:11,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:11,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:11,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:12,087 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 23:53:12,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:12,087 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 23:53:12,094 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:12,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:12,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:12,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:12,884 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 23:53:12,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:12,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 23:53:12,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:53:12,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:53:12,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:53:12,905 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 23:53:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:13,119 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:53:13,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:53:13,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 23:53:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:13,120 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:53:13,120 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:53:13,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:53:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:53:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 23:53:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 23:53:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 23:53:13,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 23:53:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:13,125 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 23:53:13,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:53:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 23:53:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:53:13,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:13,126 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 23:53:13,126 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:13,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:13,127 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 23:53:13,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:13,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:13,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:13,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:13,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:14,092 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 23:53:14,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:14,093 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 23:53:14,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:14,135 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:53:14,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:14,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:14,939 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 23:53:14,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:14,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 23:53:14,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:53:14,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:53:14,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:53:14,961 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 23:53:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:15,311 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:53:15,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:53:15,311 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 23:53:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:15,312 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:53:15,312 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:53:15,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:53:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:53:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:53:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:53:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 23:53:15,316 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 23:53:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:15,317 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 23:53:15,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:53:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 23:53:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 23:53:15,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:15,317 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 23:53:15,317 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:15,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 23:53:15,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:15,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:15,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:15,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:15,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:16,288 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 23:53:16,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:16,288 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 23:53:16,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:16,329 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:53:16,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:16,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:17,127 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 23:53:17,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:17,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 23:53:17,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:53:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:53:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:53:17,148 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 23:53:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:17,323 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:53:17,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:53:17,323 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 23:53:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:17,324 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:53:17,325 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 23:53:17,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:53:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 23:53:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 23:53:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:53:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 23:53:17,329 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 23:53:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:17,329 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 23:53:17,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:53:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 23:53:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:53:17,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:17,330 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 23:53:17,330 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:17,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 23:53:17,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:17,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:17,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:17,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:17,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:18,867 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 23:53:18,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:18,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:18,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:18,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:19,774 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 23:53:19,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:19,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 23:53:19,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:53:19,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:53:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:53:19,795 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 23:53:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:19,954 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:53:19,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:53:19,954 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 23:53:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:19,955 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:53:19,955 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:53:19,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:53:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:53:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 23:53:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:53:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 23:53:19,960 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 23:53:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:19,961 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 23:53:19,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:53:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 23:53:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:53:19,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:19,961 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 23:53:19,962 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:19,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 23:53:19,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:19,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:19,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:19,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:19,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:20,767 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 23:53:20,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:20,767 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 23:53:20,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:20,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:20,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:20,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:21,684 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 23:53:21,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:21,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 23:53:21,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:53:21,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:53:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:53:21,705 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 23:53:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:21,903 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:53:21,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:53:21,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 23:53:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:21,904 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:53:21,904 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:53:21,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:53:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:53:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:53:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:53:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 23:53:21,909 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 23:53:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:21,909 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 23:53:21,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:53:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 23:53:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 23:53:21,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:21,910 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 23:53:21,910 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:21,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 23:53:21,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:21,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:21,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:21,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:21,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:23,230 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 23:53:23,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:23,230 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 23:53:23,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:23,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:53:23,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:23,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:24,465 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 23:53:24,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:24,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 23:53:24,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:53:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:53:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:53:24,486 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 23:53:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:24,667 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:53:24,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:53:24,668 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 23:53:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:24,669 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:53:24,669 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 23:53:24,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:53:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 23:53:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 23:53:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 23:53:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 23:53:24,673 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 23:53:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:24,673 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 23:53:24,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:53:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 23:53:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:53:24,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:24,674 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 23:53:24,674 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:24,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 23:53:24,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:24,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:24,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:24,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:24,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:25,508 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 23:53:25,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:25,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:25,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:25,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:25,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:25,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:26,524 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 23:53:26,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:26,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 23:53:26,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:53:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:53:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:53:26,547 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 23:53:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:26,716 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:53:26,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:53:26,716 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 23:53:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:26,717 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:53:26,717 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:53:26,718 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 23:53:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:53:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:53:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:53:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 23:53:26,723 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 23:53:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:26,723 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 23:53:26,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:53:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 23:53:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 23:53:26,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:26,724 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 23:53:26,724 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:26,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 23:53:26,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:26,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:26,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:26,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:26,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:27,627 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 23:53:27,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:27,628 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 23:53:27,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:27,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:53:27,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:27,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:29,005 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 23:53:29,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:29,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 23:53:29,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:53:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:53:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:53:29,027 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 23:53:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:29,217 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:53:29,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:53:29,217 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 23:53:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:29,218 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:53:29,219 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 23:53:29,220 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 23:53:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 23:53:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 23:53:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 23:53:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 23:53:29,224 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 23:53:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:29,224 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 23:53:29,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:53:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 23:53:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 23:53:29,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:29,225 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 23:53:29,225 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:29,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 23:53:29,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:29,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:29,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:29,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:29,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:30,071 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 23:53:30,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:30,072 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 23:53:30,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:30,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:53:30,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:30,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:31,371 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 23:53:31,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:31,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 23:53:31,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:53:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:53:31,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:53:31,394 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 23:53:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:31,605 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:53:31,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:53:31,605 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 23:53:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:31,606 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:53:31,606 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 23:53:31,607 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 23:53:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 23:53:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 23:53:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 23:53:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 23:53:31,611 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 23:53:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:31,611 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 23:53:31,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:53:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 23:53:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 23:53:31,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:31,612 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 23:53:31,612 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:31,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:31,612 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 23:53:31,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:31,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:31,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:31,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:31,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:33,218 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 23:53:33,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:33,219 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 23:53:33,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:33,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:34,730 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 23:53:34,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:34,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 23:53:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:53:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:53:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:53:34,752 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 23:53:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:34,926 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:53:34,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:53:34,927 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 23:53:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:34,928 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:53:34,928 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 23:53:34,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:53:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 23:53:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 23:53:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 23:53:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 23:53:34,932 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 23:53:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:34,933 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 23:53:34,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:53:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 23:53:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 23:53:34,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:34,934 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 23:53:34,934 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:34,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 23:53:34,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:34,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:34,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:36,026 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 23:53:36,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:36,027 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 23:53:36,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:36,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:36,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:36,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:37,288 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 23:53:37,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:37,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 23:53:37,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:53:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:53:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:53:37,309 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 23:53:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:37,492 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:53:37,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:53:37,493 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 23:53:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:37,494 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:53:37,494 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:53:37,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:53:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:53:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 23:53:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 23:53:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 23:53:37,499 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 23:53:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:37,499 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 23:53:37,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:53:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 23:53:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 23:53:37,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:37,500 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 23:53:37,501 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:37,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 23:53:37,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:37,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:37,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:37,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:37,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:38,554 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 23:53:38,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:38,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:38,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:38,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 23:53:38,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:38,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:40,280 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 23:53:40,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:40,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 23:53:40,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:53:40,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:53:40,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:53:40,302 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 23:53:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:40,545 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:53:40,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:53:40,545 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 23:53:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:40,546 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:53:40,547 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 23:53:40,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:53:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 23:53:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 23:53:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 23:53:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 23:53:40,551 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 23:53:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:40,552 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 23:53:40,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:53:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 23:53:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 23:53:40,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:40,553 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 23:53:40,553 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:40,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 23:53:40,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:40,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:40,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:40,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:40,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:41,990 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 23:53:41,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:41,990 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 23:53:41,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:42,024 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:42,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:42,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:43,324 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 23:53:43,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:43,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 23:53:43,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:53:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:53:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:53:43,347 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 23:53:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:43,540 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:53:43,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:53:43,541 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 23:53:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:43,542 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:53:43,542 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 23:53:43,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:53:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 23:53:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 23:53:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 23:53:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 23:53:43,547 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 23:53:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:43,548 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 23:53:43,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:53:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 23:53:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 23:53:43,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:43,548 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 23:53:43,549 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:43,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 23:53:43,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:43,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:43,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:43,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:43,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:45,147 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 23:53:45,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:45,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:53:45,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:45,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 23:53:45,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:45,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:46,644 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 23:53:46,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:46,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 23:53:46,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:53:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:53:46,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:53:46,666 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 23:53:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:46,869 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:53:46,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:53:46,870 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 23:53:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:46,871 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:53:46,871 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 23:53:46,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:53:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 23:53:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 23:53:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:53:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 23:53:46,876 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 23:53:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:46,876 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 23:53:46,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:53:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 23:53:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 23:53:46,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:46,877 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 23:53:46,877 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:46,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 23:53:46,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:46,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:46,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:46,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:46,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:47,981 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 23:53:47,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:47,981 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 23:53:47,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:48,033 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:53:48,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:48,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:49,616 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 23:53:49,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:49,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 23:53:49,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:53:49,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:53:49,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:53:49,638 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 23:53:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:49,884 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:53:49,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:53:49,884 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 23:53:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:49,885 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:53:49,885 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 23:53:49,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:53:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 23:53:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 23:53:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 23:53:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 23:53:49,891 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 23:53:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:49,891 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 23:53:49,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:53:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 23:53:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 23:53:49,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:49,892 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 23:53:49,892 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:49,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 23:53:49,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:49,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:49,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:49,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:49,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:51,125 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 23:53:51,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:51,125 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 23:53:51,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:51,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:53,720 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 23:53:53,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:53,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 23:53:53,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:53:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:53:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:53:53,741 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 23:53:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:54,008 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:53:54,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:53:54,008 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 23:53:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:54,011 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:53:54,011 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 23:53:54,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:53:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 23:53:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 23:53:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 23:53:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 23:53:54,017 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 23:53:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:54,018 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 23:53:54,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:53:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 23:53:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 23:53:54,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:54,019 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 23:53:54,019 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:54,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 23:53:54,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:54,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:54,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:54,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:54,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:55,387 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 23:53:55,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:55,388 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 23:53:55,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:55,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:55,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:55,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:56,906 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 23:53:56,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:56,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 23:53:56,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:53:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:53:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:53:56,928 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 23:53:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:58,249 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:53:58,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:53:58,249 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 23:53:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:58,251 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:53:58,251 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:53:58,253 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 23:53:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:53:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 23:53:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:53:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 23:53:58,257 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 23:53:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:58,257 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 23:53:58,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:53:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 23:53:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 23:53:58,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:58,258 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 23:53:58,258 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:58,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 23:53:58,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:58,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:58,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:58,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:58,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:00,233 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 23:54:00,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:00,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:00,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:00,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:54:00,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:00,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:01,811 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 23:54:01,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:01,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 23:54:01,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:54:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:54:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:54:01,833 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 23:54:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:02,046 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:54:02,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:54:02,047 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 23:54:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:02,048 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:54:02,048 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 23:54:02,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:54:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 23:54:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 23:54:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 23:54:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 23:54:02,053 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 23:54:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:02,054 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 23:54:02,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:54:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 23:54:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:54:02,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:02,054 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 23:54:02,055 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:02,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 23:54:02,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:02,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:02,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:02,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:02,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:03,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:03,259 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 23:54:03,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:03,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:03,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:03,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:05,334 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 23:54:05,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:05,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 23:54:05,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:54:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:54:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:54:05,355 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 23:54:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:05,561 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:54:05,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:54:05,561 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 23:54:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:05,562 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:54:05,563 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 23:54:05,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:54:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 23:54:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 23:54:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 23:54:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 23:54:05,568 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 23:54:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:05,568 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 23:54:05,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:54:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 23:54:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 23:54:05,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:05,569 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 23:54:05,569 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:05,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 23:54:05,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:05,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:05,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:05,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:06,793 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 23:54:06,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:06,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:06,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:06,925 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:54:06,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:06,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:08,754 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 23:54:08,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:08,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 23:54:08,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:54:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:54:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:54:08,778 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 23:54:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:08,992 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:54:08,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:54:08,993 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 23:54:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:08,994 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:54:08,994 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 23:54:08,995 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 23:54:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 23:54:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 23:54:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:54:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 23:54:08,999 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 23:54:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:08,999 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 23:54:08,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:54:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 23:54:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 23:54:08,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:08,999 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 23:54:09,000 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:09,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 23:54:09,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:09,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:09,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:09,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:11,990 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 23:54:11,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:11,990 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 23:54:11,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:12,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:54:12,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:12,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:13,854 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 23:54:13,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:13,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 23:54:13,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:54:13,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:54:13,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:54:13,876 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 23:54:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:14,122 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:54:14,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:54:14,122 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 23:54:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:14,123 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:54:14,123 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 23:54:14,124 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 23:54:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 23:54:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 23:54:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 23:54:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 23:54:14,128 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 23:54:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:14,128 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 23:54:14,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:54:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 23:54:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 23:54:14,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:14,129 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 23:54:14,129 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:14,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 23:54:14,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:14,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:14,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:14,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:14,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:15,819 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 23:54:15,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:15,819 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 23:54:15,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:15,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:17,595 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 23:54:17,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:17,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 23:54:17,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:54:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:54:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:54:17,616 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 23:54:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:18,108 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:54:18,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:54:18,109 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 23:54:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:18,110 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:54:18,110 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 23:54:18,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:54:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 23:54:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 23:54:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 23:54:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 23:54:18,116 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 23:54:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:18,116 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 23:54:18,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:54:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 23:54:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 23:54:18,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:18,117 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 23:54:18,117 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:18,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 23:54:18,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:18,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:18,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:18,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:18,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:19,620 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 23:54:19,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:19,621 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 23:54:19,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:19,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:19,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:19,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:21,716 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 23:54:21,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:21,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 23:54:21,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:54:21,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:54:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:54:21,738 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 23:54:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:22,034 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:54:22,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:54:22,035 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 23:54:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:22,036 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:54:22,036 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 23:54:22,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:54:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 23:54:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 23:54:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 23:54:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 23:54:22,040 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 23:54:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:22,040 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 23:54:22,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:54:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 23:54:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 23:54:22,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:22,041 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 23:54:22,041 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:22,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 23:54:22,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:22,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:22,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:22,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:22,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:23,516 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 23:54:23,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:23,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:23,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:23,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 23:54:23,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:23,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:25,681 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 23:54:25,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:25,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 23:54:25,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:54:25,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:54:25,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:54:25,703 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 23:54:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:25,959 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:54:25,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:54:25,959 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 23:54:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:25,960 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:54:25,960 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 23:54:25,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:54:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 23:54:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 23:54:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 23:54:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 23:54:25,964 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 23:54:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:25,965 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 23:54:25,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:54:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 23:54:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 23:54:25,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:25,965 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 23:54:25,966 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:25,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 23:54:25,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:25,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:25,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:25,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:25,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:28,415 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 23:54:28,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:28,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:28,425 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:28,460 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:28,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:28,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:30,886 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 23:54:30,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:30,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 23:54:30,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:54:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:54:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:54:30,908 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 23:54:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:31,192 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:54:31,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:54:31,192 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 23:54:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:31,193 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:54:31,193 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 23:54:31,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:54:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 23:54:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 23:54:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 23:54:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 23:54:31,197 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 23:54:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:31,197 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 23:54:31,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:54:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 23:54:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 23:54:31,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:31,198 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 23:54:31,198 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:31,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 23:54:31,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:31,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:31,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:31,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:31,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:32,719 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 23:54:32,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:32,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:32,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:32,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 23:54:32,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:32,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:34,909 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 23:54:34,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:34,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 23:54:34,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:54:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:54:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:54:34,931 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 23:54:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:35,220 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:54:35,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:54:35,220 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 23:54:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:35,221 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:54:35,221 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 23:54:35,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:54:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 23:54:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 23:54:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 23:54:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 23:54:35,226 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 23:54:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:35,227 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 23:54:35,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:54:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 23:54:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 23:54:35,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:35,228 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 23:54:35,228 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:35,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 23:54:35,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:35,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:35,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:35,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:35,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:37,098 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 23:54:37,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:37,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:37,108 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:37,170 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:54:37,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:37,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:39,206 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 23:54:39,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:39,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 23:54:39,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:54:39,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:54:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:54:39,228 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 23:54:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:39,482 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 23:54:39,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:54:39,483 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 23:54:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:39,484 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:54:39,484 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 23:54:39,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:54:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 23:54:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 23:54:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 23:54:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 23:54:39,488 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 23:54:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:39,489 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 23:54:39,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:54:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 23:54:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 23:54:39,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:39,489 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 23:54:39,490 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:39,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 23:54:39,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:39,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:39,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:39,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:39,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:41,423 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 23:54:41,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:41,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:41,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:41,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:43,610 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 23:54:43,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:43,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 23:54:43,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:54:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:54:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:54:43,632 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 23:54:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:43,935 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:54:43,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:54:43,936 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 23:54:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:43,937 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:54:43,937 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 23:54:43,938 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 23:54:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 23:54:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 23:54:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 23:54:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 23:54:43,942 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 23:54:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:43,942 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 23:54:43,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:54:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 23:54:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 23:54:43,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:43,943 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 23:54:43,943 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:43,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 23:54:43,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:43,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:43,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:45,961 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 23:54:45,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:45,961 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 23:54:45,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:46,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:46,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:46,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:48,216 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 23:54:48,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:48,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 23:54:48,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:54:48,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:54:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:54:48,238 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 23:54:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:48,487 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 23:54:48,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:54:48,487 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 23:54:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:48,488 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:54:48,489 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 23:54:48,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:54:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 23:54:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 23:54:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 23:54:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 23:54:48,494 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 23:54:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:48,494 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 23:54:48,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:54:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 23:54:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 23:54:48,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:48,495 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 23:54:48,495 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:48,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 23:54:48,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:48,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:48,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:48,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:48,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:50,236 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 23:54:50,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:50,236 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 23:54:50,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:50,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 23:54:50,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:50,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:52,742 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 23:54:52,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:52,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 23:54:52,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:54:52,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:54:52,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:54:52,766 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 23:54:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:53,073 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:54:53,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:54:53,074 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 23:54:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:53,075 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:54:53,075 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 23:54:53,076 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 23:54:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 23:54:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 23:54:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 23:54:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 23:54:53,081 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 23:54:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:53,081 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 23:54:53,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:54:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 23:54:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 23:54:53,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:53,082 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 23:54:53,083 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:53,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 23:54:53,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:53,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:53,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:53,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:53,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:54,912 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 23:54:54,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:54,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:54:54,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:54,961 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:54,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:54,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:57,517 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 23:54:57,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:57,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 23:54:57,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:54:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:54:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:54:57,540 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 23:54:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:57,806 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 23:54:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:54:57,807 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 23:54:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:57,808 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:54:57,808 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 23:54:57,809 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 23:54:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 23:54:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 23:54:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 23:54:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 23:54:57,814 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 23:54:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:57,814 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 23:54:57,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:54:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 23:54:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 23:54:57,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:57,815 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 23:54:57,815 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:57,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:57,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 23:54:57,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:57,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:57,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:57,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:57,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:59,695 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 23:54:59,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:59,696 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 23:54:59,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:59,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 23:54:59,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:59,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:03,076 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 23:55:03,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:03,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 23:55:03,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:55:03,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:55:03,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:55:03,099 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 23:55:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:03,444 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:55:03,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:55:03,444 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 23:55:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:03,445 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:55:03,446 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 23:55:03,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:55:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 23:55:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 23:55:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:55:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 23:55:03,451 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 23:55:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:03,451 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 23:55:03,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:55:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 23:55:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 23:55:03,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:03,452 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 23:55:03,452 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:03,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 23:55:03,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:03,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:03,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:05,541 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 23:55:05,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:05,542 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 23:55:05,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:05,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:55:05,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:05,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:08,303 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 23:55:08,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:08,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 23:55:08,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:55:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:55:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:55:08,325 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 23:55:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:08,635 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 23:55:08,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:55:08,636 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 23:55:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:08,636 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:55:08,636 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 23:55:08,637 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 23:55:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 23:55:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 23:55:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 23:55:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 23:55:08,640 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 23:55:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:08,641 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 23:55:08,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:55:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 23:55:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 23:55:08,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:08,641 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 23:55:08,642 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:08,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:08,642 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 23:55:08,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:08,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:08,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:08,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:08,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:10,660 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 23:55:10,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:10,661 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 23:55:10,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:10,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:13,399 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 23:55:13,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:13,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 23:55:13,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:55:13,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:55:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:55:13,421 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 23:55:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:13,755 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:55:13,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:55:13,755 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 23:55:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:13,757 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:55:13,757 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 23:55:13,758 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 23:55:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 23:55:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 23:55:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 23:55:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 23:55:13,763 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 23:55:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:13,763 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 23:55:13,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:55:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 23:55:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 23:55:13,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:13,764 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 23:55:13,764 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:13,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 23:55:13,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:13,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:13,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:13,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:13,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:15,813 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 23:55:15,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:15,813 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 23:55:15,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:15,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:15,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:15,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:18,669 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 23:55:18,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:18,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 23:55:18,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:55:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:55:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:55:18,692 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 23:55:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:19,015 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 23:55:19,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:55:19,016 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 23:55:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:19,017 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:55:19,017 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 23:55:19,018 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 23:55:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 23:55:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 23:55:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 23:55:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 23:55:19,022 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 23:55:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:19,023 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 23:55:19,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:55:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 23:55:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 23:55:19,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:19,024 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 23:55:19,024 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:19,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 23:55:19,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:19,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:19,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:19,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:19,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:21,095 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 23:55:21,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:21,096 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 23:55:21,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:21,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 23:55:21,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:21,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:24,078 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 23:55:24,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:24,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 23:55:24,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:55:24,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:55:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:55:24,100 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 23:55:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:24,472 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:55:24,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:55:24,472 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 23:55:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:24,474 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:55:24,474 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 23:55:24,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:55:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 23:55:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 23:55:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 23:55:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 23:55:24,479 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 23:55:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:24,479 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 23:55:24,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:55:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 23:55:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 23:55:24,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:24,480 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 23:55:24,480 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:24,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 23:55:24,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:24,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:24,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:24,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:26,947 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 23:55:26,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:26,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:55:26,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:26,993 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:26,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:26,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:29,935 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 23:55:29,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:29,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 23:55:29,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:55:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:55:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:55:29,957 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 23:55:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:30,349 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 23:55:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:55:30,350 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 23:55:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:30,350 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:55:30,351 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 23:55:30,351 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 23:55:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 23:55:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 23:55:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 23:55:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 23:55:30,355 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 23:55:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:30,356 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 23:55:30,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:55:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 23:55:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 23:55:30,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:30,356 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 23:55:30,356 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:30,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 23:55:30,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:30,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:30,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:30,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:30,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:33,173 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 23:55:33,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:33,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:55:33,181 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:33,385 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 23:55:33,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:33,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:36,426 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 23:55:36,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:36,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 23:55:36,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:55:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:55:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:55:36,449 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 23:55:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:36,924 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:55:36,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:55:36,925 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 23:55:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:36,925 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:55:36,926 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 23:55:36,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:55:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 23:55:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 23:55:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 23:55:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 23:55:36,931 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 23:55:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:36,931 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 23:55:36,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:55:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 23:55:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 23:55:36,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:36,932 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 23:55:36,932 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:36,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 23:55:36,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:36,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:36,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:36,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:36,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:39,209 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 23:55:39,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:39,209 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 23:55:39,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:39,315 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:55:39,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:39,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:42,462 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 23:55:42,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:42,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 23:55:42,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:55:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:55:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:55:42,484 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 23:55:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:43,086 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 23:55:43,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:55:43,087 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 23:55:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:43,088 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:55:43,088 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 23:55:43,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:55:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 23:55:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 23:55:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 23:55:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 23:55:43,093 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 23:55:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:43,094 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 23:55:43,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:55:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 23:55:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 23:55:43,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:43,095 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 23:55:43,095 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:43,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 23:55:43,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:43,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:43,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:43,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:43,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:45,398 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 23:55:45,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:45,398 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 23:55:45,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:45,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:48,695 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 23:55:48,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:48,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 23:55:48,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:55:48,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:55:48,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:55:48,717 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 23:55:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:49,095 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:55:49,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:55:49,095 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 23:55:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:49,097 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:55:49,097 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 23:55:49,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:55:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 23:55:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 23:55:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 23:55:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 23:55:49,103 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 23:55:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:49,104 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 23:55:49,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:55:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 23:55:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 23:55:49,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:49,105 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 23:55:49,105 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:49,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 23:55:49,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:49,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:49,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:49,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:49,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:51,516 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 23:55:51,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:51,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:55:51,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:51,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:51,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:51,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:54,857 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 23:55:54,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:54,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 23:55:54,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:55:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:55:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:55:54,879 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 23:55:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:55,276 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 23:55:55,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:55:55,276 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 23:55:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:55,277 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:55:55,277 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 23:55:55,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:55:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 23:55:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 23:55:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 23:55:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 23:55:55,283 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 23:55:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:55,283 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 23:55:55,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:55:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 23:55:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 23:55:55,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:55,284 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 23:55:55,284 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:55,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 23:55:55,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:55,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:55,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:55,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:55,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:57,957 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 23:55:57,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:57,957 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 23:55:57,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:58,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 23:55:58,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:58,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:01,155 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 23:56:01,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:01,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 23:56:01,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:56:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:56:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:56:01,178 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 23:56:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:01,594 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:56:01,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:56:01,595 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 23:56:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:01,596 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:56:01,596 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 23:56:01,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:56:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 23:56:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 23:56:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 23:56:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 23:56:01,601 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 23:56:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:01,601 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 23:56:01,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:56:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 23:56:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 23:56:01,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:01,602 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 23:56:01,602 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:01,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 23:56:01,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:01,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:01,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:01,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:01,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:04,380 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 23:56:04,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:04,381 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 23:56:04,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:04,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:04,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:04,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:07,929 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 23:56:07,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:07,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 23:56:07,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:56:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:56:07,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:56:07,951 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 23:56:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:08,291 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 23:56:08,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:56:08,292 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 23:56:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:08,293 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:56:08,293 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 23:56:08,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:56:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 23:56:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 23:56:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 23:56:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 23:56:08,298 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 23:56:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:08,298 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 23:56:08,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:56:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 23:56:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 23:56:08,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:08,299 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 23:56:08,299 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:08,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 23:56:08,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:08,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:08,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:08,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:08,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:10,847 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 23:56:10,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:10,847 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 23:56:10,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:10,978 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 23:56:10,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:10,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:14,447 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 23:56:14,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:14,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 23:56:14,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:56:14,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:56:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:56:14,469 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 23:56:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:14,847 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:56:14,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:56:14,848 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 23:56:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:14,849 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:56:14,849 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 23:56:14,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:56:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 23:56:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 23:56:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 23:56:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 23:56:14,857 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 23:56:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:14,857 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 23:56:14,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:56:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 23:56:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 23:56:14,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:14,858 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 23:56:14,858 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:14,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 23:56:14,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:14,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:14,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:14,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:17,512 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 23:56:17,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:17,513 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 23:56:17,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:17,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:56:17,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:17,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:21,137 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 23:56:21,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:21,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 23:56:21,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:56:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:56:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:56:21,160 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 23:56:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:21,568 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 23:56:21,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:56:21,569 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 23:56:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:21,570 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:56:21,570 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 23:56:21,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:56:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 23:56:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 23:56:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 23:56:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 23:56:21,577 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 23:56:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:21,577 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 23:56:21,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:56:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 23:56:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 23:56:21,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:21,578 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 23:56:21,578 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:21,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 23:56:21,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:21,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:21,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:21,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:21,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:24,585 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 23:56:24,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:24,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:56:24,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:24,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:28,258 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 23:56:28,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:28,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 23:56:28,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:56:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:56:28,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:56:28,280 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 23:56:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:28,669 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:56:28,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:56:28,670 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 23:56:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:28,671 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:56:28,671 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 23:56:28,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:56:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 23:56:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 23:56:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 23:56:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 23:56:28,676 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 23:56:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:28,677 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 23:56:28,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:56:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 23:56:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 23:56:28,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:28,678 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 23:56:28,678 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:28,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 23:56:28,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:28,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:28,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:28,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:28,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:31,406 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 23:56:31,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:31,407 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 23:56:31,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:31,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:31,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:31,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:35,188 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 23:56:35,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:35,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 23:56:35,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:56:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:56:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:56:35,211 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-30 23:56:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:35,623 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 23:56:35,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:56:35,623 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-30 23:56:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:35,625 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:56:35,625 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 23:56:35,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:56:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 23:56:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 23:56:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 23:56:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 23:56:35,630 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-30 23:56:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:35,630 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 23:56:35,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:56:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 23:56:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 23:56:35,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:35,631 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-30 23:56:35,631 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:35,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-30 23:56:35,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:35,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:35,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:35,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:35,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:38,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:38,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:38,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:39,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 23:56:39,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:39,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 164 [2018-09-30 23:56:42,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:56:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:56:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10374, Invalid=17016, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:56:42,661 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-09-30 23:56:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:43,066 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:56:43,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:56:43,066 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-09-30 23:56:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:43,067 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:56:43,067 INFO L226 Difference]: Without dead ends: 168 [2018-09-30 23:56:43,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13284 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10374, Invalid=17016, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:56:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-30 23:56:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-09-30 23:56:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 23:56:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-09-30 23:56:43,071 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-09-30 23:56:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:43,072 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-09-30 23:56:43,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:56:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-09-30 23:56:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 23:56:43,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:43,073 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-09-30 23:56:43,073 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:43,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-09-30 23:56:43,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:43,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:43,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:43,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:46,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:46,208 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:46,255 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:46,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:46,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:50,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 23:56:50,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:56:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:56:50,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10625, Invalid=17431, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:56:50,167 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-09-30 23:56:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:50,594 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 23:56:50,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:56:50,594 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-09-30 23:56:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:50,595 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:56:50,595 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 23:56:50,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13612 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=10625, Invalid=17431, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:56:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 23:56:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-09-30 23:56:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 23:56:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-09-30 23:56:50,600 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-09-30 23:56:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:50,600 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-09-30 23:56:50,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:56:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-09-30 23:56:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-30 23:56:50,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:50,602 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-09-30 23:56:50,602 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:50,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-09-30 23:56:50,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:50,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:50,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:50,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:53,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:53,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:54,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 23:56:54,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:54,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:57,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 168 [2018-09-30 23:56:57,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:56:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:56:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10879, Invalid=17851, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:56:57,871 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 170 states. [2018-09-30 23:56:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:58,269 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:56:58,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:56:58,270 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 169 [2018-09-30 23:56:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:58,271 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:56:58,271 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 23:56:58,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13944 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10879, Invalid=17851, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:56:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 23:56:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 23:56:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 23:56:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-09-30 23:56:58,277 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2018-09-30 23:56:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:58,277 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-09-30 23:56:58,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:56:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-09-30 23:56:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 23:56:58,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:58,278 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1] [2018-09-30 23:56:58,278 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:58,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:58,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1887452040, now seen corresponding path program 84 times [2018-09-30 23:56:58,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:58,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:58,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:58,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:01,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:01,672 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:01,771 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:57:01,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:01,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:05,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 170 [2018-09-30 23:57:05,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 23:57:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 23:57:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11136, Invalid=18276, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:57:05,931 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 172 states. [2018-09-30 23:57:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:06,394 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 23:57:06,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:57:06,395 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 171 [2018-09-30 23:57:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:06,396 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:57:06,396 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 23:57:06,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14280 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11136, Invalid=18276, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:57:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 23:57:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-09-30 23:57:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-30 23:57:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-09-30 23:57:06,403 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2018-09-30 23:57:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:06,404 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-09-30 23:57:06,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 23:57:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-09-30 23:57:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 23:57:06,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:06,405 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1] [2018-09-30 23:57:06,405 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:06,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1365212618, now seen corresponding path program 85 times [2018-09-30 23:57:06,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:06,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:06,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:06,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:06,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:09,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:09,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:09,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:09,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:13,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-09-30 23:57:13,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-09-30 23:57:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-09-30 23:57:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11396, Invalid=18706, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:57:13,860 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 174 states. [2018-09-30 23:57:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:14,360 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 23:57:14,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:57:14,360 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 173 [2018-09-30 23:57:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:14,362 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:57:14,362 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 23:57:14,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14620 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11396, Invalid=18706, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:57:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 23:57:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 23:57:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 23:57:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-09-30 23:57:14,370 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2018-09-30 23:57:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:14,370 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-09-30 23:57:14,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-09-30 23:57:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-09-30 23:57:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-30 23:57:14,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:14,371 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1] [2018-09-30 23:57:14,371 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:14,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2004301708, now seen corresponding path program 86 times [2018-09-30 23:57:14,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:14,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:14,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:17,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:17,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:17,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:17,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:17,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:17,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:21,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 174 [2018-09-30 23:57:21,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-09-30 23:57:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-09-30 23:57:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11659, Invalid=19141, Unknown=0, NotChecked=0, Total=30800 [2018-09-30 23:57:21,955 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 176 states. [2018-09-30 23:57:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:22,365 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 23:57:22,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:57:22,365 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 175 [2018-09-30 23:57:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:22,366 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:57:22,367 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 23:57:22,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14964 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=11659, Invalid=19141, Unknown=0, NotChecked=0, Total=30800 [2018-09-30 23:57:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 23:57:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-30 23:57:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 23:57:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-09-30 23:57:22,372 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2018-09-30 23:57:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:22,373 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-09-30 23:57:22,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-09-30 23:57:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-09-30 23:57:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 23:57:22,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:22,374 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1] [2018-09-30 23:57:22,374 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:22,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1988593870, now seen corresponding path program 87 times [2018-09-30 23:57:22,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:22,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:22,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:22,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:26,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:26,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:26,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 23:57:26,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:26,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:30,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:30,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 176 [2018-09-30 23:57:30,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-09-30 23:57:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-09-30 23:57:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11925, Invalid=19581, Unknown=0, NotChecked=0, Total=31506 [2018-09-30 23:57:30,520 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 178 states. [2018-09-30 23:57:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:30,973 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 23:57:30,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:57:30,973 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 177 [2018-09-30 23:57:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:30,975 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:57:30,975 INFO L226 Difference]: Without dead ends: 180 [2018-09-30 23:57:30,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15312 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11925, Invalid=19581, Unknown=0, NotChecked=0, Total=31506 [2018-09-30 23:57:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-09-30 23:57:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-09-30 23:57:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 23:57:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-09-30 23:57:30,981 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2018-09-30 23:57:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:30,981 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-09-30 23:57:30,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-09-30 23:57:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-09-30 23:57:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 23:57:30,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:30,982 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1] [2018-09-30 23:57:30,982 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:30,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash -221736560, now seen corresponding path program 88 times [2018-09-30 23:57:30,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:30,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:30,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:30,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:34,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:34,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:34,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:34,309 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:34,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:34,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:38,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:38,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 178 [2018-09-30 23:57:38,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-09-30 23:57:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-09-30 23:57:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12194, Invalid=20026, Unknown=0, NotChecked=0, Total=32220 [2018-09-30 23:57:38,748 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 180 states. [2018-09-30 23:57:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:39,214 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 23:57:39,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:57:39,214 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 179 [2018-09-30 23:57:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:39,215 INFO L225 Difference]: With dead ends: 183 [2018-09-30 23:57:39,216 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 23:57:39,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15664 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12194, Invalid=20026, Unknown=0, NotChecked=0, Total=32220 [2018-09-30 23:57:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 23:57:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-30 23:57:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 23:57:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-09-30 23:57:39,220 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2018-09-30 23:57:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:39,220 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-09-30 23:57:39,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-09-30 23:57:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-09-30 23:57:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-30 23:57:39,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:39,221 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1] [2018-09-30 23:57:39,221 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:39,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1659531730, now seen corresponding path program 89 times [2018-09-30 23:57:39,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:39,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:39,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:39,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:42,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:42,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:42,980 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:43,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 23:57:43,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:43,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:47,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 180 [2018-09-30 23:57:47,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-09-30 23:57:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-09-30 23:57:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12466, Invalid=20476, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:57:47,647 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 182 states. [2018-09-30 23:57:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:48,161 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 23:57:48,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:57:48,161 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 181 [2018-09-30 23:57:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:48,162 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:57:48,163 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 23:57:48,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16020 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=12466, Invalid=20476, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:57:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 23:57:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-30 23:57:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 23:57:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-09-30 23:57:48,167 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2018-09-30 23:57:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:48,167 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-09-30 23:57:48,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-09-30 23:57:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-09-30 23:57:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 23:57:48,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:48,168 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1] [2018-09-30 23:57:48,168 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:48,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1377126804, now seen corresponding path program 90 times [2018-09-30 23:57:48,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:48,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:48,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:48,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:48,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:51,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:51,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:51,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:52,042 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 23:57:52,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:52,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:56,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:56,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 182 [2018-09-30 23:57:56,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-09-30 23:57:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-09-30 23:57:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12741, Invalid=20931, Unknown=0, NotChecked=0, Total=33672 [2018-09-30 23:57:56,732 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 184 states. [2018-09-30 23:57:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:57,262 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 23:57:57,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:57:57,262 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 183 [2018-09-30 23:57:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:57,263 INFO L225 Difference]: With dead ends: 187 [2018-09-30 23:57:57,263 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 23:57:57,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16380 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=12741, Invalid=20931, Unknown=0, NotChecked=0, Total=33672 [2018-09-30 23:57:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 23:57:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-30 23:57:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-30 23:57:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-09-30 23:57:57,269 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2018-09-30 23:57:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:57,270 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-09-30 23:57:57,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-09-30 23:57:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-09-30 23:57:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-30 23:57:57,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:57,271 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1] [2018-09-30 23:57:57,271 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:57,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash 568932566, now seen corresponding path program 91 times [2018-09-30 23:57:57,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:57,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:57,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:57,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:57,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:01,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:01,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:01,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:05,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:05,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 184 [2018-09-30 23:58:05,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-09-30 23:58:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-09-30 23:58:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13019, Invalid=21391, Unknown=0, NotChecked=0, Total=34410 [2018-09-30 23:58:05,855 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 186 states. [2018-09-30 23:58:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:06,383 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 23:58:06,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:58:06,383 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 185 [2018-09-30 23:58:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:06,384 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:58:06,384 INFO L226 Difference]: Without dead ends: 188 [2018-09-30 23:58:06,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16744 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=13019, Invalid=21391, Unknown=0, NotChecked=0, Total=34410 [2018-09-30 23:58:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-30 23:58:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-09-30 23:58:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-09-30 23:58:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-09-30 23:58:06,391 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2018-09-30 23:58:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:06,391 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-09-30 23:58:06,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-09-30 23:58:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-09-30 23:58:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-30 23:58:06,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:06,392 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1] [2018-09-30 23:58:06,392 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:06,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350424, now seen corresponding path program 92 times [2018-09-30 23:58:06,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:06,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:06,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:06,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:06,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:10,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:10,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:10,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:10,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:10,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:10,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:14,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 186 [2018-09-30 23:58:14,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-09-30 23:58:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-09-30 23:58:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13300, Invalid=21856, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 23:58:14,944 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 188 states. [2018-09-30 23:58:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:15,427 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 23:58:15,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:58:15,428 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 187 [2018-09-30 23:58:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:15,428 INFO L225 Difference]: With dead ends: 191 [2018-09-30 23:58:15,429 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 23:58:15,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17112 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=13300, Invalid=21856, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 23:58:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 23:58:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-30 23:58:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 23:58:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-09-30 23:58:15,435 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2018-09-30 23:58:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:15,435 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-09-30 23:58:15,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-09-30 23:58:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-09-30 23:58:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-30 23:58:15,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:15,437 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1] [2018-09-30 23:58:15,437 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:15,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash 644144602, now seen corresponding path program 93 times [2018-09-30 23:58:15,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:15,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:15,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:19,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:19,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:19,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:19,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 23:58:19,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:19,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:24,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:24,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 188 [2018-09-30 23:58:24,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-09-30 23:58:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-09-30 23:58:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13584, Invalid=22326, Unknown=0, NotChecked=0, Total=35910 [2018-09-30 23:58:24,208 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 190 states. [2018-09-30 23:58:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:24,676 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 23:58:24,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:58:24,676 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 189 [2018-09-30 23:58:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:24,678 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:58:24,678 INFO L226 Difference]: Without dead ends: 192 [2018-09-30 23:58:24,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=13584, Invalid=22326, Unknown=0, NotChecked=0, Total=35910 [2018-09-30 23:58:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-30 23:58:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-09-30 23:58:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-09-30 23:58:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-09-30 23:58:24,683 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2018-09-30 23:58:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:24,684 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-09-30 23:58:24,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-09-30 23:58:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-09-30 23:58:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 23:58:24,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:24,684 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1] [2018-09-30 23:58:24,685 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:24,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash 547672988, now seen corresponding path program 94 times [2018-09-30 23:58:24,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:24,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:24,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:24,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:24,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:28,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:28,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:28,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:28,798 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:28,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:28,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:33,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:33,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 190 [2018-09-30 23:58:33,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-09-30 23:58:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-09-30 23:58:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13871, Invalid=22801, Unknown=0, NotChecked=0, Total=36672 [2018-09-30 23:58:33,753 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 192 states. [2018-09-30 23:58:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:34,221 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 23:58:34,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:58:34,222 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 191 [2018-09-30 23:58:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:34,223 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:58:34,223 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 23:58:34,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17860 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=13871, Invalid=22801, Unknown=0, NotChecked=0, Total=36672 [2018-09-30 23:58:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 23:58:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-30 23:58:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-30 23:58:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-09-30 23:58:34,228 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2018-09-30 23:58:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:34,229 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-09-30 23:58:34,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-09-30 23:58:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-09-30 23:58:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-30 23:58:34,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:34,229 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1] [2018-09-30 23:58:34,230 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:34,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1967234850, now seen corresponding path program 95 times [2018-09-30 23:58:34,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:34,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:34,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:34,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:34,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:38,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:38,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:38,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:38,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 23:58:38,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:38,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:43,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:43,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 192 [2018-09-30 23:58:43,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-09-30 23:58:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-09-30 23:58:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14161, Invalid=23281, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:58:43,560 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 194 states. [2018-09-30 23:58:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:44,087 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 23:58:44,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:58:44,087 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 193 [2018-09-30 23:58:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:44,089 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:58:44,089 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 23:58:44,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18240 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=14161, Invalid=23281, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:58:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 23:58:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 23:58:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 23:58:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-09-30 23:58:44,094 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2018-09-30 23:58:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:44,094 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-09-30 23:58:44,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-09-30 23:58:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-09-30 23:58:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-30 23:58:44,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:44,096 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1] [2018-09-30 23:58:44,096 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:44,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash -727079520, now seen corresponding path program 96 times [2018-09-30 23:58:44,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:44,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:48,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:48,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 23:58:48,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:53,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 194 [2018-09-30 23:58:53,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-09-30 23:58:53,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-09-30 23:58:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14454, Invalid=23766, Unknown=0, NotChecked=0, Total=38220 [2018-09-30 23:58:53,587 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 196 states. [2018-09-30 23:58:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,144 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 23:58:54,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:58:54,145 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 195 [2018-09-30 23:58:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,146 INFO L225 Difference]: With dead ends: 199 [2018-09-30 23:58:54,146 INFO L226 Difference]: Without dead ends: 198 [2018-09-30 23:58:54,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18624 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=14454, Invalid=23766, Unknown=0, NotChecked=0, Total=38220 [2018-09-30 23:58:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-30 23:58:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-09-30 23:58:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-09-30 23:58:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-09-30 23:58:54,152 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2018-09-30 23:58:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,152 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-09-30 23:58:54,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-09-30 23:58:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-09-30 23:58:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 23:58:54,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,153 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1] [2018-09-30 23:58:54,153 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1356251618, now seen corresponding path program 97 times [2018-09-30 23:58:54,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:58,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:58,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:03,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:03,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 196 [2018-09-30 23:59:03,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-09-30 23:59:03,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-09-30 23:59:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14750, Invalid=24256, Unknown=0, NotChecked=0, Total=39006 [2018-09-30 23:59:03,711 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 198 states. [2018-09-30 23:59:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:04,251 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 23:59:04,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:59:04,251 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 197 [2018-09-30 23:59:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:04,252 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:59:04,252 INFO L226 Difference]: Without dead ends: 200 [2018-09-30 23:59:04,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19012 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=14750, Invalid=24256, Unknown=0, NotChecked=0, Total=39006 [2018-09-30 23:59:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-30 23:59:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-30 23:59:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 23:59:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-09-30 23:59:04,258 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2018-09-30 23:59:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:04,258 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-09-30 23:59:04,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-09-30 23:59:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-09-30 23:59:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-30 23:59:04,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:04,259 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1] [2018-09-30 23:59:04,259 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:04,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:04,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1982715300, now seen corresponding path program 98 times [2018-09-30 23:59:04,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:04,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:04,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:04,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:08,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:08,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:08,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:08,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:08,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:08,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:14,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:14,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 198 [2018-09-30 23:59:14,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-09-30 23:59:14,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-09-30 23:59:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15049, Invalid=24751, Unknown=0, NotChecked=0, Total=39800 [2018-09-30 23:59:14,048 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 200 states. [2018-09-30 23:59:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:14,529 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 23:59:14,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:59:14,530 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 199 [2018-09-30 23:59:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:14,531 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:59:14,532 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 23:59:14,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19404 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=15049, Invalid=24751, Unknown=0, NotChecked=0, Total=39800 [2018-09-30 23:59:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 23:59:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-30 23:59:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 23:59:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-09-30 23:59:14,538 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2018-09-30 23:59:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:14,538 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-09-30 23:59:14,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-09-30 23:59:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-09-30 23:59:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-09-30 23:59:14,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:14,539 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1] [2018-09-30 23:59:14,539 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:14,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1576075034, now seen corresponding path program 99 times [2018-09-30 23:59:14,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:14,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:14,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:14,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:19,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:19,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:19,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 23:59:19,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:19,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:24,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 200 [2018-09-30 23:59:24,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-09-30 23:59:24,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-09-30 23:59:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:59:24,561 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 202 states. [2018-09-30 23:59:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:25,099 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 23:59:25,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:59:25,099 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 201 [2018-09-30 23:59:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:25,100 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:59:25,101 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 23:59:25,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19800 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=15351, Invalid=25251, Unknown=0, NotChecked=0, Total=40602 [2018-09-30 23:59:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 23:59:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-09-30 23:59:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-30 23:59:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-09-30 23:59:25,106 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2018-09-30 23:59:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:25,106 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-09-30 23:59:25,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-09-30 23:59:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-09-30 23:59:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 23:59:25,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:25,107 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1] [2018-09-30 23:59:25,107 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:25,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:25,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1515348904, now seen corresponding path program 100 times [2018-09-30 23:59:25,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:25,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:25,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:25,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:29,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:29,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:29,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:29,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:29,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:35,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 202 [2018-09-30 23:59:35,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-09-30 23:59:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-09-30 23:59:35,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15656, Invalid=25756, Unknown=0, NotChecked=0, Total=41412 [2018-09-30 23:59:35,390 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 204 states. [2018-09-30 23:59:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:35,969 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 23:59:35,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:59:35,970 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 203 [2018-09-30 23:59:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:35,971 INFO L225 Difference]: With dead ends: 207 [2018-09-30 23:59:35,971 INFO L226 Difference]: Without dead ends: 206 [2018-09-30 23:59:35,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20200 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=15656, Invalid=25756, Unknown=0, NotChecked=0, Total=41412 [2018-09-30 23:59:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-30 23:59:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-30 23:59:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-30 23:59:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-09-30 23:59:35,980 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2018-09-30 23:59:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:35,980 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-09-30 23:59:35,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-09-30 23:59:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-09-30 23:59:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-30 23:59:35,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:35,981 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1] [2018-09-30 23:59:35,982 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:35,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 256384490, now seen corresponding path program 101 times [2018-09-30 23:59:35,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:35,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:35,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:35,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:35,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:40,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:40,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:40,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:40,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 23:59:40,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:40,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:46,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:46,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 204 [2018-09-30 23:59:46,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-09-30 23:59:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-09-30 23:59:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15964, Invalid=26266, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:59:46,556 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 206 states. [2018-09-30 23:59:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:47,130 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 23:59:47,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:59:47,130 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 205 [2018-09-30 23:59:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:47,131 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:59:47,131 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 23:59:47,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20604 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=15964, Invalid=26266, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:59:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 23:59:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-30 23:59:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 23:59:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-09-30 23:59:47,137 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2018-09-30 23:59:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:47,137 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-09-30 23:59:47,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-09-30 23:59:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-09-30 23:59:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 23:59:47,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:47,138 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1] [2018-09-30 23:59:47,138 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:47,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1572360108, now seen corresponding path program 102 times [2018-09-30 23:59:47,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:47,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:47,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:47,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:51,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:51,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:51,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:51,971 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 23:59:51,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:51,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:57,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:57,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 206 [2018-09-30 23:59:57,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-09-30 23:59:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-09-30 23:59:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16275, Invalid=26781, Unknown=0, NotChecked=0, Total=43056 [2018-09-30 23:59:57,771 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 208 states. [2018-09-30 23:59:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:58,405 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 23:59:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:59:58,405 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 207 [2018-09-30 23:59:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:58,406 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:59:58,406 INFO L226 Difference]: Without dead ends: 210 [2018-09-30 23:59:58,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21012 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=16275, Invalid=26781, Unknown=0, NotChecked=0, Total=43056 [2018-09-30 23:59:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-09-30 23:59:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-09-30 23:59:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 23:59:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-09-30 23:59:58,413 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2018-09-30 23:59:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:58,414 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-09-30 23:59:58,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-09-30 23:59:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-09-30 23:59:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 23:59:58,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:58,415 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1] [2018-09-30 23:59:58,415 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:58,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -790423314, now seen corresponding path program 103 times [2018-09-30 23:59:58,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:58,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:58,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:58,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:03,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:03,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:03,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:03,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:09,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:09,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 208 [2018-10-01 00:00:09,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-10-01 00:00:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-10-01 00:00:09,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16589, Invalid=27301, Unknown=0, NotChecked=0, Total=43890 [2018-10-01 00:00:09,125 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 210 states. [2018-10-01 00:00:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:09,778 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-01 00:00:09,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 00:00:09,778 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 209 [2018-10-01 00:00:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:09,779 INFO L225 Difference]: With dead ends: 213 [2018-10-01 00:00:09,780 INFO L226 Difference]: Without dead ends: 212 [2018-10-01 00:00:09,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21424 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=16589, Invalid=27301, Unknown=0, NotChecked=0, Total=43890 [2018-10-01 00:00:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-01 00:00:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-01 00:00:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-01 00:00:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-01 00:00:09,788 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2018-10-01 00:00:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:09,788 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-01 00:00:09,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-10-01 00:00:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-01 00:00:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-01 00:00:09,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:09,790 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1] [2018-10-01 00:00:09,790 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:09,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash 612407728, now seen corresponding path program 104 times [2018-10-01 00:00:09,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:09,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:09,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:09,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:09,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:14,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:14,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:14,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:14,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:14,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:14,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:20,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:20,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 210 [2018-10-01 00:00:20,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-10-01 00:00:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-10-01 00:00:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16906, Invalid=27826, Unknown=0, NotChecked=0, Total=44732 [2018-10-01 00:00:20,892 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 212 states. [2018-10-01 00:00:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:21,465 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-10-01 00:00:21,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:00:21,466 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 211 [2018-10-01 00:00:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:21,467 INFO L225 Difference]: With dead ends: 215 [2018-10-01 00:00:21,467 INFO L226 Difference]: Without dead ends: 214 [2018-10-01 00:00:21,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21840 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=16906, Invalid=27826, Unknown=0, NotChecked=0, Total=44732 [2018-10-01 00:00:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-01 00:00:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-01 00:00:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-01 00:00:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-10-01 00:00:21,474 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2018-10-01 00:00:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:21,474 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-10-01 00:00:21,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-10-01 00:00:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-10-01 00:00:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-01 00:00:21,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:21,475 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1] [2018-10-01 00:00:21,475 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:21,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 113308146, now seen corresponding path program 105 times [2018-10-01 00:00:21,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:21,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:21,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:21,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:26,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:26,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:26,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-01 00:00:26,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:26,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:32,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 212 [2018-10-01 00:00:32,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-10-01 00:00:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-10-01 00:00:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17226, Invalid=28356, Unknown=0, NotChecked=0, Total=45582 [2018-10-01 00:00:32,762 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 214 states. [2018-10-01 00:00:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:33,401 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-01 00:00:33,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-01 00:00:33,402 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 213 [2018-10-01 00:00:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:33,402 INFO L225 Difference]: With dead ends: 217 [2018-10-01 00:00:33,403 INFO L226 Difference]: Without dead ends: 216 [2018-10-01 00:00:33,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22260 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=17226, Invalid=28356, Unknown=0, NotChecked=0, Total=45582 [2018-10-01 00:00:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-01 00:00:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-01 00:00:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-01 00:00:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-10-01 00:00:33,409 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2018-10-01 00:00:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:33,410 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-10-01 00:00:33,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-10-01 00:00:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-10-01 00:00:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-01 00:00:33,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:33,411 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1] [2018-10-01 00:00:33,411 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:33,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:33,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1514946996, now seen corresponding path program 106 times [2018-10-01 00:00:33,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:33,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:33,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:33,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:33,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:38,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:38,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:38,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:38,512 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:38,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:38,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:44,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:44,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 214 [2018-10-01 00:00:44,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-10-01 00:00:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-10-01 00:00:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17549, Invalid=28891, Unknown=0, NotChecked=0, Total=46440 [2018-10-01 00:00:44,967 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 216 states. [2018-10-01 00:00:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:45,672 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-01 00:00:45,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-01 00:00:45,672 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 215 [2018-10-01 00:00:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:45,673 INFO L225 Difference]: With dead ends: 219 [2018-10-01 00:00:45,673 INFO L226 Difference]: Without dead ends: 218 [2018-10-01 00:00:45,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22684 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=17549, Invalid=28891, Unknown=0, NotChecked=0, Total=46440 [2018-10-01 00:00:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-01 00:00:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-10-01 00:00:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-01 00:00:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-01 00:00:45,679 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2018-10-01 00:00:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:45,679 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-01 00:00:45,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-10-01 00:00:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-01 00:00:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-01 00:00:45,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:45,680 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1] [2018-10-01 00:00:45,680 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:45,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash -129849098, now seen corresponding path program 107 times [2018-10-01 00:00:45,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:45,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:45,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:45,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:50,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:50,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:50,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:50,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-01 00:00:50,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:50,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:57,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:57,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 216 [2018-10-01 00:00:57,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-10-01 00:00:57,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-10-01 00:00:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17875, Invalid=29431, Unknown=0, NotChecked=0, Total=47306 [2018-10-01 00:00:57,163 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 218 states. [2018-10-01 00:00:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:57,884 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-01 00:00:57,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 00:00:57,884 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 217 [2018-10-01 00:00:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:57,885 INFO L225 Difference]: With dead ends: 221 [2018-10-01 00:00:57,885 INFO L226 Difference]: Without dead ends: 220 [2018-10-01 00:00:57,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23112 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=17875, Invalid=29431, Unknown=0, NotChecked=0, Total=47306 [2018-10-01 00:00:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-01 00:00:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-10-01 00:00:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-01 00:00:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2018-10-01 00:00:57,891 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 217 [2018-10-01 00:00:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:57,892 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2018-10-01 00:00:57,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-10-01 00:00:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2018-10-01 00:00:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-01 00:00:57,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:57,892 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1] [2018-10-01 00:00:57,893 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:57,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -230930504, now seen corresponding path program 108 times [2018-10-01 00:00:57,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:57,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:57,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:57,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:57,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:03,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:03,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:03,233 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:03,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-10-01 00:01:03,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:03,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:10,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:10,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 218 [2018-10-01 00:01:10,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 220 states [2018-10-01 00:01:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2018-10-01 00:01:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18204, Invalid=29976, Unknown=0, NotChecked=0, Total=48180 [2018-10-01 00:01:10,064 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 220 states. [2018-10-01 00:01:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:10,739 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-01 00:01:10,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-01 00:01:10,739 INFO L78 Accepts]: Start accepts. Automaton has 220 states. Word has length 219 [2018-10-01 00:01:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:10,740 INFO L225 Difference]: With dead ends: 223 [2018-10-01 00:01:10,740 INFO L226 Difference]: Without dead ends: 222 [2018-10-01 00:01:10,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=18204, Invalid=29976, Unknown=0, NotChecked=0, Total=48180 [2018-10-01 00:01:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-01 00:01:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-10-01 00:01:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-01 00:01:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-10-01 00:01:10,746 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 219 [2018-10-01 00:01:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:10,747 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-10-01 00:01:10,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 220 states. [2018-10-01 00:01:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-10-01 00:01:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-01 00:01:10,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:10,748 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1] [2018-10-01 00:01:10,748 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:10,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1414086138, now seen corresponding path program 109 times [2018-10-01 00:01:10,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:10,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:10,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:10,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:10,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:16,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:16,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:16,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:16,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:22,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 220 [2018-10-01 00:01:22,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-10-01 00:01:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-10-01 00:01:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18536, Invalid=30526, Unknown=0, NotChecked=0, Total=49062 [2018-10-01 00:01:22,693 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 222 states. [2018-10-01 00:01:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:23,412 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-01 00:01:23,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-01 00:01:23,413 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 221 [2018-10-01 00:01:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:23,413 INFO L225 Difference]: With dead ends: 225 [2018-10-01 00:01:23,413 INFO L226 Difference]: Without dead ends: 224 [2018-10-01 00:01:23,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23980 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=18536, Invalid=30526, Unknown=0, NotChecked=0, Total=49062 [2018-10-01 00:01:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-01 00:01:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2018-10-01 00:01:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-01 00:01:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-01 00:01:23,419 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 221 [2018-10-01 00:01:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:23,419 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-01 00:01:23,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-10-01 00:01:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-01 00:01:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-01 00:01:23,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:23,420 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1] [2018-10-01 00:01:23,420 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:23,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1727114172, now seen corresponding path program 110 times [2018-10-01 00:01:23,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:23,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:23,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:23,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:28,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:28,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:28,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:28,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:28,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:28,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:35,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:35,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 222 [2018-10-01 00:01:35,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 224 states [2018-10-01 00:01:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2018-10-01 00:01:35,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18871, Invalid=31081, Unknown=0, NotChecked=0, Total=49952 [2018-10-01 00:01:35,668 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 224 states. [2018-10-01 00:01:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:36,465 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-01 00:01:36,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-01 00:01:36,466 INFO L78 Accepts]: Start accepts. Automaton has 224 states. Word has length 223 [2018-10-01 00:01:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:36,466 INFO L225 Difference]: With dead ends: 227 [2018-10-01 00:01:36,466 INFO L226 Difference]: Without dead ends: 226 [2018-10-01 00:01:36,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24420 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=18871, Invalid=31081, Unknown=0, NotChecked=0, Total=49952 [2018-10-01 00:01:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-01 00:01:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-01 00:01:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-01 00:01:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2018-10-01 00:01:36,471 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 223 [2018-10-01 00:01:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:36,471 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2018-10-01 00:01:36,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 224 states. [2018-10-01 00:01:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2018-10-01 00:01:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-01 00:01:36,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:36,472 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1] [2018-10-01 00:01:36,472 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:36,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1899344126, now seen corresponding path program 111 times [2018-10-01 00:01:36,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:36,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:36,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:36,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:36,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:42,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:42,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:42,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:42,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-10-01 00:01:42,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:42,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:48,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:48,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 224 [2018-10-01 00:01:48,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-10-01 00:01:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-10-01 00:01:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19209, Invalid=31641, Unknown=0, NotChecked=0, Total=50850 [2018-10-01 00:01:48,980 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand 226 states. [2018-10-01 00:01:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:49,721 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-01 00:01:49,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-01 00:01:49,721 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 225 [2018-10-01 00:01:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:49,722 INFO L225 Difference]: With dead ends: 229 [2018-10-01 00:01:49,722 INFO L226 Difference]: Without dead ends: 228 [2018-10-01 00:01:49,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24864 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=19209, Invalid=31641, Unknown=0, NotChecked=0, Total=50850 [2018-10-01 00:01:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-01 00:01:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-01 00:01:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-01 00:01:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-10-01 00:01:49,728 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 225 [2018-10-01 00:01:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:49,728 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-10-01 00:01:49,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-10-01 00:01:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-10-01 00:01:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-01 00:01:49,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:49,729 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1] [2018-10-01 00:01:49,729 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:49,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash -91394624, now seen corresponding path program 112 times [2018-10-01 00:01:49,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:49,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:49,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:49,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:49,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:55,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:55,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:55,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:55,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:55,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:55,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:02,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:02,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 226 [2018-10-01 00:02:02,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-10-01 00:02:02,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-10-01 00:02:02,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19550, Invalid=32206, Unknown=0, NotChecked=0, Total=51756 [2018-10-01 00:02:02,432 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 228 states. [2018-10-01 00:02:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:03,066 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-10-01 00:02:03,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 00:02:03,066 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 227 [2018-10-01 00:02:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:03,067 INFO L225 Difference]: With dead ends: 231 [2018-10-01 00:02:03,067 INFO L226 Difference]: Without dead ends: 230 [2018-10-01 00:02:03,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25312 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=19550, Invalid=32206, Unknown=0, NotChecked=0, Total=51756 [2018-10-01 00:02:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-01 00:02:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2018-10-01 00:02:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-01 00:02:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-01 00:02:03,074 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 227 [2018-10-01 00:02:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:03,075 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-01 00:02:03,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-10-01 00:02:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-01 00:02:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-01 00:02:03,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:03,075 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1] [2018-10-01 00:02:03,076 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:03,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:03,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1930886654, now seen corresponding path program 113 times [2018-10-01 00:02:03,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:03,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:03,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:03,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:03,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:08,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:08,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:08,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:09,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-10-01 00:02:09,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:09,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:16,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:16,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 228 [2018-10-01 00:02:16,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-10-01 00:02:16,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-10-01 00:02:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19894, Invalid=32776, Unknown=0, NotChecked=0, Total=52670 [2018-10-01 00:02:16,212 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 230 states. [2018-10-01 00:02:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:16,808 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-10-01 00:02:16,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-10-01 00:02:16,808 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 229 [2018-10-01 00:02:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:16,809 INFO L225 Difference]: With dead ends: 233 [2018-10-01 00:02:16,810 INFO L226 Difference]: Without dead ends: 232 [2018-10-01 00:02:16,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25764 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=19894, Invalid=32776, Unknown=0, NotChecked=0, Total=52670 [2018-10-01 00:02:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-10-01 00:02:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-10-01 00:02:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-01 00:02:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2018-10-01 00:02:16,816 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 229 [2018-10-01 00:02:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:16,816 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2018-10-01 00:02:16,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-10-01 00:02:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2018-10-01 00:02:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-01 00:02:16,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:16,817 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1] [2018-10-01 00:02:16,817 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:16,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash -156201532, now seen corresponding path program 114 times [2018-10-01 00:02:16,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:16,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:16,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:16,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:16,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:22,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:22,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:22,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:22,779 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-10-01 00:02:22,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:22,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:30,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:30,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 230 [2018-10-01 00:02:30,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 232 states [2018-10-01 00:02:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2018-10-01 00:02:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20241, Invalid=33351, Unknown=0, NotChecked=0, Total=53592 [2018-10-01 00:02:30,104 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 232 states. [2018-10-01 00:02:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:30,755 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-01 00:02:30,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-01 00:02:30,756 INFO L78 Accepts]: Start accepts. Automaton has 232 states. Word has length 231 [2018-10-01 00:02:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:30,756 INFO L225 Difference]: With dead ends: 235 [2018-10-01 00:02:30,756 INFO L226 Difference]: Without dead ends: 234 [2018-10-01 00:02:30,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26220 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=20241, Invalid=33351, Unknown=0, NotChecked=0, Total=53592 [2018-10-01 00:02:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-01 00:02:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-10-01 00:02:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-01 00:02:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-10-01 00:02:30,761 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 231 [2018-10-01 00:02:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:30,762 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-10-01 00:02:30,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 232 states. [2018-10-01 00:02:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-10-01 00:02:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-01 00:02:30,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:30,763 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1] [2018-10-01 00:02:30,763 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:30,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:30,763 INFO L82 PathProgramCache]: Analyzing trace with hash 214184198, now seen corresponding path program 115 times [2018-10-01 00:02:30,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:30,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:30,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:30,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:30,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:36,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:36,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:36,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:36,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:44,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:44,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 232 [2018-10-01 00:02:44,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-10-01 00:02:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-10-01 00:02:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20591, Invalid=33931, Unknown=0, NotChecked=0, Total=54522 [2018-10-01 00:02:44,098 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 234 states. [2018-10-01 00:02:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:44,824 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-01 00:02:44,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-01 00:02:44,824 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 233 [2018-10-01 00:02:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:44,825 INFO L225 Difference]: With dead ends: 237 [2018-10-01 00:02:44,825 INFO L226 Difference]: Without dead ends: 236 [2018-10-01 00:02:44,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26680 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=20591, Invalid=33931, Unknown=0, NotChecked=0, Total=54522 [2018-10-01 00:02:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-01 00:02:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-01 00:02:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-01 00:02:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-01 00:02:44,830 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 233 [2018-10-01 00:02:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-01 00:02:44,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-10-01 00:02:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-01 00:02:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-01 00:02:44,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:44,832 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1] [2018-10-01 00:02:44,832 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:44,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:44,832 INFO L82 PathProgramCache]: Analyzing trace with hash -327414840, now seen corresponding path program 116 times [2018-10-01 00:02:44,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:44,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:44,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:44,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:44,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:50,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:50,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:50,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:50,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:50,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:50,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:58,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:58,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 234 [2018-10-01 00:02:58,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 236 states [2018-10-01 00:02:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2018-10-01 00:02:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20944, Invalid=34516, Unknown=0, NotChecked=0, Total=55460 [2018-10-01 00:02:58,481 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 236 states. [2018-10-01 00:02:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:59,208 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-10-01 00:02:59,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-01 00:02:59,208 INFO L78 Accepts]: Start accepts. Automaton has 236 states. Word has length 235 [2018-10-01 00:02:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:59,209 INFO L225 Difference]: With dead ends: 239 [2018-10-01 00:02:59,209 INFO L226 Difference]: Without dead ends: 238 [2018-10-01 00:02:59,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27144 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=20944, Invalid=34516, Unknown=0, NotChecked=0, Total=55460 [2018-10-01 00:02:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-10-01 00:02:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-10-01 00:02:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-01 00:02:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-10-01 00:02:59,215 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 235 [2018-10-01 00:02:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:59,215 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-10-01 00:02:59,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 236 states. [2018-10-01 00:02:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-10-01 00:02:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-01 00:02:59,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:59,216 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1] [2018-10-01 00:02:59,216 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:59,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1113047542, now seen corresponding path program 117 times [2018-10-01 00:02:59,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:59,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:59,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:59,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:59,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:05,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:05,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:05,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:05,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-10-01 00:03:05,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:05,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:13,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:13,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 236 [2018-10-01 00:03:13,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-10-01 00:03:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-10-01 00:03:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21300, Invalid=35106, Unknown=0, NotChecked=0, Total=56406 [2018-10-01 00:03:13,305 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 238 states. [2018-10-01 00:03:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:14,175 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-01 00:03:14,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-01 00:03:14,176 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 237 [2018-10-01 00:03:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:14,177 INFO L225 Difference]: With dead ends: 241 [2018-10-01 00:03:14,177 INFO L226 Difference]: Without dead ends: 240 [2018-10-01 00:03:14,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27612 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=21300, Invalid=35106, Unknown=0, NotChecked=0, Total=56406 [2018-10-01 00:03:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-01 00:03:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-10-01 00:03:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-01 00:03:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-10-01 00:03:14,183 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 237 [2018-10-01 00:03:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:14,184 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-10-01 00:03:14,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-10-01 00:03:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-10-01 00:03:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-01 00:03:14,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:14,185 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1] [2018-10-01 00:03:14,185 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:14,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -191830068, now seen corresponding path program 118 times [2018-10-01 00:03:14,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:14,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:14,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:14,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:14,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:20,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:20,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:20,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:20,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:20,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:20,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:28,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:28,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 238 [2018-10-01 00:03:28,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-10-01 00:03:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-10-01 00:03:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21659, Invalid=35701, Unknown=0, NotChecked=0, Total=57360 [2018-10-01 00:03:28,261 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 240 states. [2018-10-01 00:03:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:28,872 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-10-01 00:03:28,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-01 00:03:28,872 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 239 [2018-10-01 00:03:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:28,873 INFO L225 Difference]: With dead ends: 243 [2018-10-01 00:03:28,873 INFO L226 Difference]: Without dead ends: 242 [2018-10-01 00:03:28,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28084 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=21659, Invalid=35701, Unknown=0, NotChecked=0, Total=57360 [2018-10-01 00:03:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-01 00:03:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2018-10-01 00:03:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-01 00:03:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-01 00:03:28,879 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 239 [2018-10-01 00:03:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:28,880 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-01 00:03:28,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-10-01 00:03:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-01 00:03:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-01 00:03:28,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:28,881 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1] [2018-10-01 00:03:28,881 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:28,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 334899470, now seen corresponding path program 119 times [2018-10-01 00:03:28,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:28,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:28,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:28,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:28,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:35,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:35,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:35,081 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:35,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-10-01 00:03:35,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:35,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:43,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:43,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 240 [2018-10-01 00:03:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 242 states [2018-10-01 00:03:43,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2018-10-01 00:03:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22021, Invalid=36301, Unknown=0, NotChecked=0, Total=58322 [2018-10-01 00:03:43,061 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 242 states. [2018-10-01 00:03:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:43,844 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-10-01 00:03:43,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-01 00:03:43,844 INFO L78 Accepts]: Start accepts. Automaton has 242 states. Word has length 241 [2018-10-01 00:03:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:43,845 INFO L225 Difference]: With dead ends: 245 [2018-10-01 00:03:43,845 INFO L226 Difference]: Without dead ends: 244 [2018-10-01 00:03:43,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28560 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=22021, Invalid=36301, Unknown=0, NotChecked=0, Total=58322 [2018-10-01 00:03:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-01 00:03:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-10-01 00:03:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-01 00:03:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2018-10-01 00:03:43,852 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 241 [2018-10-01 00:03:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:43,852 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2018-10-01 00:03:43,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 242 states. [2018-10-01 00:03:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2018-10-01 00:03:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-01 00:03:43,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:43,853 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1] [2018-10-01 00:03:43,853 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:43,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -284155440, now seen corresponding path program 120 times [2018-10-01 00:03:43,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:43,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:43,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:43,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:43,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:50,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:50,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:50,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:50,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-10-01 00:03:50,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:50,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:58,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:58,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 242 [2018-10-01 00:03:58,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 244 states [2018-10-01 00:03:58,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2018-10-01 00:03:58,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22386, Invalid=36906, Unknown=0, NotChecked=0, Total=59292 [2018-10-01 00:03:58,243 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 244 states. [2018-10-01 00:03:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:59,149 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-01 00:03:59,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-01 00:03:59,150 INFO L78 Accepts]: Start accepts. Automaton has 244 states. Word has length 243 [2018-10-01 00:03:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:59,150 INFO L225 Difference]: With dead ends: 247 [2018-10-01 00:03:59,150 INFO L226 Difference]: Without dead ends: 246 [2018-10-01 00:03:59,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29040 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=22386, Invalid=36906, Unknown=0, NotChecked=0, Total=59292 [2018-10-01 00:03:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-01 00:03:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-01 00:03:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-01 00:03:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-10-01 00:03:59,156 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 243 [2018-10-01 00:03:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:59,156 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-10-01 00:03:59,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 244 states. [2018-10-01 00:03:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-10-01 00:03:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-01 00:03:59,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:59,157 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1] [2018-10-01 00:03:59,157 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:59,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1804530194, now seen corresponding path program 121 times [2018-10-01 00:03:59,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:59,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:59,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:59,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:59,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:05,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:05,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:05,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:05,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:13,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:13,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 244 [2018-10-01 00:04:13,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 246 states [2018-10-01 00:04:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2018-10-01 00:04:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22754, Invalid=37516, Unknown=0, NotChecked=0, Total=60270 [2018-10-01 00:04:13,536 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 246 states. [2018-10-01 00:04:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:14,288 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-01 00:04:14,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-01 00:04:14,288 INFO L78 Accepts]: Start accepts. Automaton has 246 states. Word has length 245 [2018-10-01 00:04:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:14,289 INFO L225 Difference]: With dead ends: 249 [2018-10-01 00:04:14,289 INFO L226 Difference]: Without dead ends: 248 [2018-10-01 00:04:14,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29524 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=22754, Invalid=37516, Unknown=0, NotChecked=0, Total=60270 [2018-10-01 00:04:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-01 00:04:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-10-01 00:04:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-01 00:04:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-01 00:04:14,295 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 245 [2018-10-01 00:04:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:14,296 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-01 00:04:14,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 246 states. [2018-10-01 00:04:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-01 00:04:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-01 00:04:14,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:14,296 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1] [2018-10-01 00:04:14,297 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:14,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1013270060, now seen corresponding path program 122 times [2018-10-01 00:04:14,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:14,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:14,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:14,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:20,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:20,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:20,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:20,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:20,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:20,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:28,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 246 [2018-10-01 00:04:28,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 248 states [2018-10-01 00:04:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2018-10-01 00:04:28,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23125, Invalid=38131, Unknown=0, NotChecked=0, Total=61256 [2018-10-01 00:04:28,936 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 248 states. [2018-10-01 00:04:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:29,784 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-10-01 00:04:29,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-01 00:04:29,785 INFO L78 Accepts]: Start accepts. Automaton has 248 states. Word has length 247 [2018-10-01 00:04:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:29,786 INFO L225 Difference]: With dead ends: 251 [2018-10-01 00:04:29,786 INFO L226 Difference]: Without dead ends: 250 [2018-10-01 00:04:29,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30012 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=23125, Invalid=38131, Unknown=0, NotChecked=0, Total=61256 [2018-10-01 00:04:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-10-01 00:04:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-10-01 00:04:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-01 00:04:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 250 transitions. [2018-10-01 00:04:29,792 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 250 transitions. Word has length 247 [2018-10-01 00:04:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:29,793 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 250 transitions. [2018-10-01 00:04:29,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 248 states. [2018-10-01 00:04:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 250 transitions. [2018-10-01 00:04:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-01 00:04:29,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:29,794 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1] [2018-10-01 00:04:29,794 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:29,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1205049622, now seen corresponding path program 123 times [2018-10-01 00:04:29,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:29,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:29,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:29,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:36,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:36,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:36,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:36,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-10-01 00:04:36,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:36,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:45,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:45,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 248 [2018-10-01 00:04:45,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 250 states [2018-10-01 00:04:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2018-10-01 00:04:45,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23499, Invalid=38751, Unknown=0, NotChecked=0, Total=62250 [2018-10-01 00:04:45,064 INFO L87 Difference]: Start difference. First operand 250 states and 250 transitions. Second operand 250 states. [2018-10-01 00:04:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:45,983 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-01 00:04:45,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-01 00:04:45,983 INFO L78 Accepts]: Start accepts. Automaton has 250 states. Word has length 249 [2018-10-01 00:04:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:45,984 INFO L225 Difference]: With dead ends: 253 [2018-10-01 00:04:45,984 INFO L226 Difference]: Without dead ends: 252 [2018-10-01 00:04:45,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30504 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=23499, Invalid=38751, Unknown=0, NotChecked=0, Total=62250 [2018-10-01 00:04:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-01 00:04:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-10-01 00:04:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-01 00:04:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2018-10-01 00:04:45,991 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 249 [2018-10-01 00:04:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:45,991 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2018-10-01 00:04:45,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 250 states. [2018-10-01 00:04:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2018-10-01 00:04:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-01 00:04:45,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:45,992 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1] [2018-10-01 00:04:45,992 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:45,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1588482088, now seen corresponding path program 124 times [2018-10-01 00:04:45,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:45,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:45,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:45,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:45,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:52,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:52,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:52,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:52,839 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:52,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:52,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:01,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:01,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 250 [2018-10-01 00:05:01,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-10-01 00:05:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-10-01 00:05:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23876, Invalid=39376, Unknown=0, NotChecked=0, Total=63252 [2018-10-01 00:05:01,370 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 252 states. [2018-10-01 00:05:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:02,136 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-10-01 00:05:02,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-10-01 00:05:02,137 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 251 [2018-10-01 00:05:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:02,138 INFO L225 Difference]: With dead ends: 255 [2018-10-01 00:05:02,138 INFO L226 Difference]: Without dead ends: 254 [2018-10-01 00:05:02,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31000 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=23876, Invalid=39376, Unknown=0, NotChecked=0, Total=63252 [2018-10-01 00:05:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-01 00:05:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2018-10-01 00:05:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-01 00:05:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-01 00:05:02,145 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 251 [2018-10-01 00:05:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:02,145 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-01 00:05:02,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-10-01 00:05:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-01 00:05:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-01 00:05:02,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:02,146 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1] [2018-10-01 00:05:02,146 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:02,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1817895398, now seen corresponding path program 125 times [2018-10-01 00:05:02,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:02,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:02,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:02,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:02,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:09,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:09,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:09,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:09,280 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-10-01 00:05:09,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:09,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:17,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:17,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 252 [2018-10-01 00:05:17,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 254 states [2018-10-01 00:05:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2018-10-01 00:05:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24256, Invalid=40006, Unknown=0, NotChecked=0, Total=64262 [2018-10-01 00:05:17,949 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 254 states. [2018-10-01 00:05:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:18,837 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-10-01 00:05:18,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-01 00:05:18,837 INFO L78 Accepts]: Start accepts. Automaton has 254 states. Word has length 253 [2018-10-01 00:05:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:18,838 INFO L225 Difference]: With dead ends: 257 [2018-10-01 00:05:18,838 INFO L226 Difference]: Without dead ends: 256 [2018-10-01 00:05:18,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31500 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=24256, Invalid=40006, Unknown=0, NotChecked=0, Total=64262 [2018-10-01 00:05:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-01 00:05:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-10-01 00:05:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-01 00:05:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 256 transitions. [2018-10-01 00:05:18,846 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 256 transitions. Word has length 253 [2018-10-01 00:05:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:18,846 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 256 transitions. [2018-10-01 00:05:18,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 254 states. [2018-10-01 00:05:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 256 transitions. [2018-10-01 00:05:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-01 00:05:18,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:18,847 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1] [2018-10-01 00:05:18,848 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:18,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:18,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1054213084, now seen corresponding path program 126 times [2018-10-01 00:05:18,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:18,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:18,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:18,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:18,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-01 00:05:22,209 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:05:22,214 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:05:22,214 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:05:22 BoogieIcfgContainer [2018-10-01 00:05:22,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:05:22,215 INFO L168 Benchmark]: Toolchain (without parser) took 764844.75 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 35.7 MB). Free memory was 1.5 GB in the beginning and 698.8 MB in the end (delta: 782.1 MB). Peak memory consumption was 817.7 MB. Max. memory is 7.1 GB. [2018-10-01 00:05:22,216 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:05:22,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.94 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:05:22,217 INFO L168 Benchmark]: Boogie Preprocessor took 25.11 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:05:22,217 INFO L168 Benchmark]: RCFGBuilder took 238.83 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:05:22,218 INFO L168 Benchmark]: TraceAbstraction took 764529.68 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 35.7 MB). Free memory was 1.5 GB in the beginning and 698.8 MB in the end (delta: 760.9 MB). Peak memory consumption was 796.6 MB. Max. memory is 7.1 GB. [2018-10-01 00:05:22,219 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.94 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.11 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 238.83 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 764529.68 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 35.7 MB). Free memory was 1.5 GB in the beginning and 698.8 MB in the end (delta: 760.9 MB). Peak memory consumption was 796.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 256 with TraceHistMax 127, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 87 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 764.4s OverallTime, 127 OverallIterations, 127 TraceHistogramMax, 47.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 254 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 31269 SolverSat, 430 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24001 GetRequests, 8000 SyntacticMatches, 0 SemanticMatches, 16001 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333500 ImplicationChecksByTransitivity, 682.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=256occurred in iteration=126, 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: 0.5s AutomataMinimizationTime, 126 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 9.7s SatisfiabilityAnalysisTime, 694.6s InterpolantComputationTime, 32253 NumberOfCodeBlocks, 32253 NumberOfCodeBlocksAsserted, 4241 NumberOfCheckSat, 32002 ConstructedInterpolants, 0 QuantifiedInterpolants, 32388020 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32500 ConjunctsInSsa, 8250 ConjunctsInUnsatCore, 251 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1333500 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-05-22-228.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-05-22-228.csv Completed graceful shutdown