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/20170304-DifficultPathPrograms/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:40:21,009 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:40:21,011 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:40:21,023 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:40:21,024 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:40:21,025 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:40:21,026 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:40:21,029 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:40:21,031 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:40:21,037 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:40:21,039 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:40:21,075 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:40:21,096 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:40:21,096 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:40:21,097 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:40:21,097 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:40:21,098 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:40:21,098 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:40:21,099 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:40:21,099 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:40:21,099 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:40:21,099 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:40:21,099 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:40:21,099 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:40:21,100 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:40:21,100 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:40:21,100 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:40:21,100 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:40:21,100 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:40:21,101 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:40:21,101 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:40:21,101 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:40:21,101 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:40:21,101 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:40:21,101 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:40:21,102 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:40:21,102 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:40:21,102 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:40:21,102 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:40:21,102 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:40:21,103 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:40:21,103 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:40:21,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:40:21,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:40:21,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:40:21,170 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:40:21,170 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:40:21,171 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-10-02 11:40:21,171 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-10-02 11:40:21,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:40:21,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:40:21,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:40:21,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:40:21,235 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:40:21,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:40:21,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:40:21,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:40:21,278 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:40:21,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... [2018-10-02 11:40:21,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:40:21,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:40:21,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:40:21,298 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:40:21,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:40:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:40:21,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:40:21,582 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:40:21,582 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:40:21 BoogieIcfgContainer [2018-10-02 11:40:21,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:40:21,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:40:21,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:40:21,588 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:40:21,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:21" (1/2) ... [2018-10-02 11:40:21,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5e823e and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:40:21, skipping insertion in model container [2018-10-02 11:40:21,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:40:21" (2/2) ... [2018-10-02 11:40:21,592 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-10-02 11:40:21,603 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:40:21,614 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:40:21,663 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:40:21,664 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:40:21,664 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:40:21,665 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:40:21,665 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:40:21,665 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:40:21,665 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:40:21,665 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:40:21,665 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:40:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:40:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:40:21,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:21,688 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:40:21,689 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:21,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 11:40:21,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:21,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:21,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:21,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:21,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:21,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:40:21,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:40:21,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:40:21,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:40:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:40:21,877 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:40:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:21,933 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 11:40:21,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:40:21,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 11:40:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:21,946 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:40:21,947 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:40:21,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:40:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:40:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:40:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:40:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:40:21,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 11:40:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:21,986 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:40:21,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:40:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:40:21,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:40:21,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:21,987 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 11:40:21,987 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:21,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 11:40:21,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:21,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:21,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:21,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:21,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:22,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:22,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:22,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:22,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:40:22,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:40:22,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:40:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:40:22,207 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-02 11:40:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:22,258 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:40:22,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:40:22,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:40:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:22,260 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:40:22,260 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:40:22,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:40:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:40:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:40:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:40:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:40:22,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 11:40:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:22,265 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:40:22,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:40:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:40:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:40:22,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,266 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 11:40:22,266 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-02 11:40:22,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:22,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:22,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:22,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:22,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:22,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:22,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:22,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:40:22,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:40:22,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:40:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:40:22,449 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-02 11:40:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:22,495 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:40:22,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:40:22,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:40:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:22,496 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:40:22,496 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:40:22,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:40:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:40:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:40:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:40:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:40:22,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 11:40:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:22,501 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:40:22,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:40:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:40:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:40:22,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,502 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 11:40:22,503 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-02 11:40:22,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:22,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:22,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:22,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:22,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:40:22,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:22,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:22,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:22,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:40:22,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:40:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:40:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:40:22,682 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-02 11:40:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:22,762 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:40:22,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:40:22,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 11:40:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:22,765 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:40:22,765 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:40:22,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:40:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:40:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:40:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:40:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:40:22,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 11:40:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:22,770 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:40:22,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:40:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:40:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:40:22,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,772 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 11:40:22,772 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-02 11:40:22,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:22,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:23,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:23,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:23,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:40:23,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:40:23,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:40:23,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:40:23,146 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-02 11:40:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,240 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:40:23,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:40:23,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 11:40:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,241 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:40:23,243 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:40:23,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:40:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:40:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:40:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:40:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:40:23,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 11:40:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,251 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:40:23,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:40:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:40:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:40:23,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,253 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 11:40:23,253 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-02 11:40:23,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:23,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:23,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:40:23,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:23,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:40:23,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:40:23,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:40:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:40:23,474 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-02 11:40:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,509 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:40:23,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:40:23,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 11:40:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,511 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:40:23,511 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:40:23,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:40:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:40:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:40:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:40:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:40:23,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 11:40:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,517 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:40:23,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:40:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:40:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:40:23,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,518 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 11:40:23,518 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-02 11:40:23,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:23,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:23,778 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:40:23,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:23,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:40:23,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:40:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:40:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:40:23,816 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-02 11:40:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,846 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:40:23,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:40:23,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:40:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,848 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:40:23,848 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:40:23,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:40:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:40:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:40:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:40:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:40:23,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 11:40:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,854 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:40:23,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:40:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:40:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:40:23,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,855 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 11:40:23,856 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,856 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-02 11:40:23,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:23,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:40:24,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:40:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:40:24,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:24,244 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-02 11:40:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,397 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:40:24,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:40:24,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:40:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,399 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:40:24,399 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:40:24,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:40:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:40:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:40:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:40:24,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 11:40:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,405 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:40:24,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:40:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:40:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:40:24,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,406 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 11:40:24,407 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-02 11:40:24,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:24,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:24,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:24,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:24,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:40:24,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:40:24,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:40:24,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:24,738 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-02 11:40:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,805 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:40:24,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:40:24,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 11:40:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,806 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:40:24,807 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:40:24,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:40:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:40:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:40:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:40:24,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 11:40:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,812 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:40:24,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:40:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:40:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:40:24,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,813 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 11:40:24,813 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-02 11:40:24,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:24,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:40:24,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:40:25,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:40:25,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:40:25,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:25,036 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-02 11:40:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,082 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:40:25,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:40:25,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 11:40:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,083 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:40:25,084 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:40:25,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:40:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:40:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:40:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:40:25,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 11:40:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,089 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:40:25,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:40:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:40:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:40:25,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,090 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 11:40:25,091 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-02 11:40:25,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:25,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,316 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:25,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:25,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:40:25,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:40:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:40:25,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:25,380 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-02 11:40:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,453 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:40:25,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:40:25,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 11:40:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,455 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:40:25,455 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:40:25,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:40:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:40:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:40:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:40:25,461 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 11:40:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,462 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:40:25,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:40:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:40:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:40:25,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,463 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 11:40:25,463 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-02 11:40:25,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:25,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,666 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:25,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:40:25,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:25,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:40:25,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:40:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:40:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:25,730 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-02 11:40:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,914 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:40:25,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:40:25,917 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 11:40:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,918 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:40:25,918 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:40:25,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:40:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:40:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:40:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:40:25,925 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 11:40:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,927 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:40:25,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:40:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:40:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:40:25,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,928 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 11:40:25,929 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-02 11:40:25,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:26,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:40:26,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:26,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:26,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:40:26,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:40:26,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:40:26,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:26,294 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-02 11:40:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:26,360 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:40:26,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:40:26,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 11:40:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:26,361 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:40:26,361 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:40:26,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:40:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:40:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:40:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:40:26,367 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 11:40:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:26,367 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:40:26,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:40:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:40:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:40:26,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:26,369 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 11:40:26,369 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:26,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-02 11:40:26,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:26,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:26,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:26,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:26,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:40:26,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:40:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:40:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:26,681 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-02 11:40:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:26,719 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:40:26,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:40:26,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 11:40:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:26,721 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:40:26,721 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:40:26,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:40:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:40:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:40:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:40:26,730 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 11:40:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:26,731 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:40:26,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:40:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:40:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:40:26,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:26,732 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 11:40:26,732 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:26,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-02 11:40:26,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:26,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:26,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:26,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:27,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:27,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:27,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:27,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:27,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:27,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:40:27,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:40:27,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:40:27,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:27,187 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-02 11:40:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:27,234 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:40:27,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:40:27,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 11:40:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:27,235 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:40:27,235 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:40:27,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:40:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:40:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:40:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:40:27,241 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 11:40:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:27,241 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:40:27,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:40:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:40:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:40:27,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:27,243 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 11:40:27,243 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:27,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-02 11:40:27,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:27,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:27,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:27,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:27,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:40:27,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:27,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:27,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:27,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:40:27,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:40:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:40:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:27,696 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-02 11:40:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:27,917 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:40:27,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:40:27,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 11:40:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:27,920 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:40:27,920 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:40:27,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:40:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:40:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:40:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:40:27,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-02 11:40:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:27,925 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:40:27,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:40:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:40:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:40:27,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:27,926 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-02 11:40:27,926 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:27,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:27,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-02 11:40:27,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:27,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:28,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:28,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:28,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:28,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:28,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:28,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:28,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:40:28,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:40:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:40:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:28,465 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-02 11:40:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,547 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:40:28,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:40:28,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 11:40:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,548 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:40:28,549 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:40:28,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:40:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:40:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:40:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:40:28,555 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-02 11:40:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,555 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:40:28,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:40:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:40:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:40:28,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,557 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 11:40:28,557 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-02 11:40:28,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:29,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:29,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:29,650 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:29,702 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:40:29,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:29,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:29,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:29,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:40:29,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:40:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:40:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:29,741 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-02 11:40:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:29,845 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:40:29,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:40:29,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 11:40:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:29,846 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:40:29,847 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:40:29,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:40:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:40:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:40:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:40:29,853 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-02 11:40:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:29,854 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:40:29,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:40:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:40:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:40:29,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:29,855 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-02 11:40:29,855 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:29,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-02 11:40:29,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:29,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:30,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:30,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:30,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:30,197 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:40:30,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:30,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:30,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:30,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:40:30,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:40:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:40:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:30,248 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-02 11:40:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:30,342 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:40:30,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:40:30,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-02 11:40:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:30,343 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:40:30,344 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:40:30,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:40:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:40:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:40:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:40:30,349 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-02 11:40:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:30,349 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:40:30,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:40:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:40:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:40:30,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:30,350 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-02 11:40:30,350 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:30,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-02 11:40:30,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:30,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:30,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:30,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:30,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:30,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:30,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:30,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:30,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:30,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:40:30,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:40:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:40:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:30,709 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-02 11:40:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:30,879 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:40:30,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:40:30,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 11:40:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:30,880 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:40:30,880 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:40:30,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:40:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:40:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:40:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:40:30,886 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-02 11:40:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:30,886 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:40:30,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:40:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:40:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:40:30,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:30,887 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-02 11:40:30,887 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:30,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:30,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-02 11:40:30,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:30,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:30,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:30,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:31,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:31,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:31,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:31,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:31,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:31,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:40:31,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:40:31,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:40:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:31,334 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-02 11:40:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:31,399 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:40:31,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:40:31,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-02 11:40:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:31,401 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:40:31,401 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:40:31,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:40:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:40:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:40:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:40:31,406 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-02 11:40:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:31,407 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:40:31,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:40:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:40:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:40:31,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:31,408 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-02 11:40:31,408 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:31,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:31,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-02 11:40:31,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:31,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:31,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:31,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:31,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:31,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:31,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:40:31,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:31,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:31,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:31,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:40:31,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:40:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:40:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:31,938 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-02 11:40:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:32,177 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:40:32,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:40:32,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 11:40:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:32,180 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:40:32,180 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:40:32,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:40:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:40:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:40:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:40:32,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-02 11:40:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:32,184 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:40:32,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:40:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:40:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:40:32,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:32,186 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-02 11:40:32,186 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:32,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:32,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-02 11:40:32,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:32,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:32,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:32,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:32,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:32,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:32,643 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:32,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:32,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:32,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:32,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:32,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:40:32,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:40:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:40:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:32,703 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-02 11:40:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:32,775 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:40:32,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:40:32,775 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-02 11:40:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:32,776 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:40:32,776 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:40:32,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:40:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:40:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:40:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:40:32,782 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-02 11:40:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:32,782 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:40:32,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:40:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:40:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:40:32,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:32,783 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-02 11:40:32,784 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:32,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-02 11:40:32,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:32,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:32,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:32,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:33,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:33,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:33,364 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:33,453 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:40:33,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:33,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:33,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:33,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:40:33,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:40:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:40:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:33,502 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-02 11:40:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:33,627 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:40:33,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:40:33,628 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 11:40:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:33,628 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:40:33,629 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:40:33,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:40:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:40:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:40:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:40:33,633 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-02 11:40:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:33,634 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:40:33,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:40:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:40:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:40:33,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:33,635 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-02 11:40:33,635 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:33,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-02 11:40:33,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:33,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:33,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:33,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:33,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:34,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:34,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:34,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:34,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:40:34,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:34,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:34,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:34,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:40:34,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:40:34,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:40:34,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:34,955 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-02 11:40:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:35,027 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:40:35,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:40:35,028 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-02 11:40:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:35,029 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:40:35,029 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:40:35,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:40:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:40:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:40:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:40:35,034 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-02 11:40:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:35,034 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:40:35,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:40:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:40:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:40:35,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:35,035 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-02 11:40:35,035 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:35,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:35,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-02 11:40:35,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:35,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:35,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:35,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:35,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:35,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:35,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:35,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:35,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:35,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:40:35,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:40:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:40:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:35,707 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-02 11:40:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:35,753 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:40:35,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:40:35,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 11:40:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:35,754 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:40:35,754 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:40:35,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:40:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:40:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:40:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:40:35,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-02 11:40:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:35,759 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:40:35,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:40:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:40:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:40:35,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:35,760 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-02 11:40:35,760 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:35,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-02 11:40:35,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:35,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:35,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:35,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:36,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:36,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:36,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:36,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:36,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:36,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:36,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:36,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:40:36,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:40:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:40:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:36,515 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-02 11:40:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:36,567 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:40:36,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:40:36,568 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-02 11:40:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:36,569 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:40:36,569 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:40:36,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:40:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:40:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:40:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:40:36,573 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-02 11:40:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:36,573 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:40:36,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:40:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:40:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:40:36,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:36,574 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-02 11:40:36,575 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:36,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-02 11:40:36,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:36,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:36,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:36,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:37,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:37,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:37,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:37,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:40:37,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:37,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:37,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:37,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:40:37,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:40:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:40:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:37,243 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-02 11:40:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:37,286 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:40:37,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:40:37,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 11:40:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:37,287 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:40:37,287 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:40:37,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:40:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:40:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:40:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:40:37,292 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-02 11:40:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:37,292 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:40:37,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:40:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:40:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:40:37,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:37,293 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-02 11:40:37,293 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:37,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-02 11:40:37,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:37,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:37,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:37,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:38,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:38,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:38,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:38,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:38,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:38,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:40:38,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:40:38,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:40:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:38,157 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-02 11:40:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:38,241 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:40:38,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:40:38,242 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-02 11:40:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:38,243 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:40:38,243 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:40:38,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:40:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:40:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:40:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:40:38,248 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-02 11:40:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:38,248 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:40:38,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:40:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:40:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:40:38,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:38,249 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-02 11:40:38,249 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:38,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:38,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-02 11:40:38,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:38,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:38,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:38,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:38,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:38,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:38,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:39,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:40:39,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:39,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:39,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:39,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:40:39,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:40:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:40:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:39,109 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-02 11:40:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:39,175 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:40:39,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:40:39,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 11:40:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:39,177 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:40:39,177 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:40:39,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:40:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:40:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:40:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 11:40:39,181 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-02 11:40:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:39,181 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 11:40:39,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:40:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 11:40:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:40:39,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:39,182 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-02 11:40:39,182 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:39,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-02 11:40:39,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:39,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:40,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:40,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:40,170 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:40,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:40:40,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:40,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:40,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:40,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:40:40,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:40:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:40:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:40,313 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-02 11:40:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:40,526 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:40:40,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:40:40,527 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-02 11:40:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:40,528 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:40:40,528 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:40:40,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:40:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:40:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:40:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:40:40,532 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-02 11:40:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:40,533 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:40:40,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:40:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:40:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:40:40,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:40,533 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-02 11:40:40,534 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:40,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-02 11:40:40,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:40,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:40,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:40,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:41,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:41,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:41,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:41,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:41,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:41,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:40:41,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:40:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:40:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:41,105 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-02 11:40:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:41,167 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:40:41,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:40:41,167 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 11:40:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:41,168 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:40:41,168 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:40:41,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:40:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:40:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:40:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 11:40:41,172 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-02 11:40:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:41,172 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 11:40:41,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:40:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 11:40:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:40:41,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:41,173 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-02 11:40:41,173 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:41,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-02 11:40:41,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:41,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:41,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:41,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:41,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:41,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:41,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:41,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:41,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:41,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:40:41,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:40:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:40:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:41,939 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-02 11:40:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:42,006 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:40:42,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:40:42,007 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-02 11:40:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:42,008 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:40:42,008 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:40:42,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:40:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:40:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:40:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:40:42,013 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-02 11:40:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:42,013 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:40:42,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:40:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:40:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:40:42,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:42,014 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-02 11:40:42,014 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:42,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:42,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-02 11:40:42,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:42,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:42,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:42,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:42,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:42,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:42,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:42,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:40:42,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:42,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:42,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:42,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:40:42,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:40:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:40:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:42,683 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-02 11:40:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:42,774 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:40:42,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:40:42,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 11:40:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:42,775 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:40:42,775 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:40:42,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:40:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:40:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:40:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 11:40:42,779 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-02 11:40:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:42,779 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 11:40:42,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:40:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 11:40:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:40:42,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:42,780 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-02 11:40:42,780 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:42,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-02 11:40:42,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:42,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:42,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:42,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:43,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:43,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:43,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:43,748 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:43,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:43,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:43,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:43,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:40:43,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:40:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:40:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:43,790 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-02 11:40:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:43,969 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:40:43,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:40:43,969 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-02 11:40:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:43,970 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:40:43,971 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:40:43,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:40:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:40:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:40:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:40:43,975 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-02 11:40:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:43,976 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:40:43,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:40:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:40:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:40:43,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:43,977 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-02 11:40:43,977 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:43,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-02 11:40:43,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:43,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:43,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:43,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:43,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:44,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:44,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:44,827 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:45,118 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:40:45,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:45,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:45,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:45,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:40:45,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:40:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:40:45,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:45,155 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-02 11:40:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:45,219 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:40:45,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:40:45,220 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 11:40:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:45,221 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:40:45,221 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:40:45,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:40:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:40:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:40:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 11:40:45,225 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-02 11:40:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:45,225 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 11:40:45,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:40:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 11:40:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:40:45,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:45,226 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-02 11:40:45,227 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:45,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-02 11:40:45,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:45,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:45,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:45,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:45,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:45,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:45,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:45,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:46,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:40:46,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:46,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:46,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:46,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:40:46,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:40:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:40:46,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:46,058 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-02 11:40:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:46,236 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:40:46,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:40:46,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-02 11:40:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:46,239 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:40:46,239 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:40:46,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:40:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:40:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:40:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:40:46,242 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-02 11:40:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:46,242 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:40:46,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:40:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:40:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:40:46,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:46,243 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-02 11:40:46,244 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:46,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-02 11:40:46,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:46,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:46,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:46,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:46,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:46,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:46,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:46,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:46,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:46,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:40:46,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:40:46,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:40:46,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:46,970 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-02 11:40:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:47,082 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:40:47,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:40:47,083 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 11:40:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:47,084 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:40:47,084 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:40:47,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:40:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:40:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:40:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 11:40:47,088 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-02 11:40:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:47,088 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 11:40:47,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:40:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 11:40:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:40:47,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:47,089 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-02 11:40:47,089 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:47,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-02 11:40:47,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:47,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:47,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:47,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:47,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:47,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:47,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:47,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:47,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:47,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:40:47,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:40:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:40:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:47,816 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-02 11:40:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:47,894 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:40:47,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:40:47,894 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-02 11:40:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:47,895 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:40:47,895 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:40:47,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:40:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:40:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:40:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:40:47,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-02 11:40:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:47,899 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:40:47,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:40:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:40:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:40:47,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:47,899 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-02 11:40:47,900 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:47,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:47,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-02 11:40:47,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:47,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:47,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:47,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:48,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:48,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:48,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:48,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:40:48,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:48,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:48,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:48,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:40:48,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:40:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:40:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:48,999 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-02 11:40:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:49,584 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:40:49,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:40:49,584 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 11:40:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:49,585 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:40:49,585 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:40:49,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:40:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:40:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:40:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 11:40:49,590 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-02 11:40:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:49,590 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 11:40:49,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:40:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 11:40:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:40:49,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:49,591 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-02 11:40:49,591 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:49,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-02 11:40:49,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:49,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:49,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:49,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:51,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:51,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:51,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:51,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:51,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:51,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:51,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:51,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:40:51,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:40:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:40:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:51,143 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-02 11:40:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:51,246 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:40:51,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:40:51,247 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-02 11:40:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:51,248 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:40:51,248 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:40:51,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:40:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:40:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:40:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:40:51,252 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-02 11:40:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:51,252 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:40:51,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:40:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:40:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:40:51,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:51,253 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-02 11:40:51,253 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:51,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-02 11:40:51,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:51,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:51,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:51,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:52,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:52,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:52,145 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:52,656 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:40:52,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:52,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:52,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:52,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:40:52,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:40:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:40:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:52,701 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-02 11:40:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:52,785 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:40:52,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:40:52,786 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 11:40:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:52,787 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:40:52,787 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:40:52,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:52,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:40:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:40:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:40:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 11:40:52,791 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-02 11:40:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:52,792 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 11:40:52,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:40:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 11:40:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:40:52,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:52,793 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-02 11:40:52,793 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:52,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-02 11:40:52,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:52,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:52,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:52,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:52,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:53,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:53,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:53,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:53,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:40:53,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:53,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:53,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:53,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:40:53,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:40:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:40:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:40:53,855 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-02 11:40:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:53,931 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:40:53,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:40:53,932 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-02 11:40:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:53,933 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:40:53,933 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:40:53,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:40:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:40:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:40:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:40:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:40:53,938 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-02 11:40:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:53,938 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:40:53,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:40:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:40:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:40:53,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:53,939 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-02 11:40:53,940 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:53,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-02 11:40:53,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:53,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:53,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:53,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:53,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:55,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:55,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:55,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:55,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:55,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:55,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:40:55,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:40:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:40:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:40:55,415 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-02 11:40:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:55,526 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:40:55,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:40:55,527 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 11:40:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:55,528 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:40:55,528 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:40:55,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:40:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:40:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:40:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:40:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 11:40:55,532 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-02 11:40:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:55,532 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 11:40:55,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:40:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 11:40:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:40:55,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:55,533 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-02 11:40:55,533 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:55,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-02 11:40:55,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:55,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:55,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:55,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:55,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:56,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:56,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:56,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:56,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:56,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:56,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:56,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:56,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:40:56,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:40:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:40:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:40:56,456 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-02 11:40:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:56,818 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:40:56,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:40:56,819 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-02 11:40:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:56,820 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:40:56,820 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:40:56,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:40:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:40:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:40:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:40:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:40:56,824 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-02 11:40:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:56,824 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:40:56,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:40:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:40:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:40:56,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:56,825 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-02 11:40:56,825 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:56,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-02 11:40:56,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:56,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:56,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:56,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:56,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:57,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:57,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:57,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:58,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:40:58,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:58,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:58,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:58,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:40:58,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:40:58,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:40:58,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:40:58,134 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-02 11:40:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:58,222 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:40:58,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:40:58,222 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 11:40:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:58,223 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:40:58,223 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:40:58,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:40:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:40:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:40:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:40:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 11:40:58,227 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-02 11:40:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:58,227 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 11:40:58,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:40:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 11:40:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:40:58,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:58,228 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-02 11:40:58,228 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:58,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-02 11:40:58,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:58,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:58,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:58,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:58,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:59,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:59,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:59,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:59,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:59,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:59,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:59,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:59,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:40:59,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:40:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:40:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:40:59,298 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-02 11:40:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:59,385 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:40:59,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:40:59,386 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-02 11:40:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:59,387 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:40:59,387 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:40:59,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:40:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:40:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:40:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:40:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:40:59,390 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-02 11:40:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:59,391 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:40:59,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:40:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:40:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:40:59,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:59,391 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-02 11:40:59,392 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:59,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-02 11:40:59,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:59,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:59,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:59,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:59,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:00,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:00,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:00,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:01,659 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:41:01,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:01,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:01,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:01,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:41:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:41:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:41:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:01,709 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-02 11:41:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:01,813 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:41:01,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:41:01,814 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 11:41:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:01,815 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:41:01,815 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:41:01,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:41:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:41:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:41:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 11:41:01,819 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-02 11:41:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:01,819 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 11:41:01,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:41:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 11:41:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:41:01,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:01,820 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-02 11:41:01,820 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:01,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-02 11:41:01,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:01,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:01,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:01,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:01,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:03,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:03,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:03,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:04,171 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:41:04,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:04,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:04,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:04,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:41:04,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:41:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:41:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:04,213 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-02 11:41:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:04,326 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:41:04,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:41:04,326 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-02 11:41:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:04,327 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:41:04,327 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:41:04,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:41:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:41:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:41:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:41:04,332 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-02 11:41:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:04,332 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:41:04,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:41:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:41:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:41:04,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:04,333 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-02 11:41:04,334 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:04,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:04,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-02 11:41:04,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:04,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:04,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:04,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:04,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:06,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:06,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:06,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:06,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:06,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:06,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:41:06,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:41:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:41:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:06,432 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-02 11:41:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:06,581 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:41:06,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:41:06,581 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 11:41:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:06,582 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:41:06,582 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:41:06,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:41:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:41:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:41:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 11:41:06,587 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-02 11:41:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:06,587 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 11:41:06,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:41:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 11:41:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:41:06,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:06,588 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-02 11:41:06,589 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:06,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-02 11:41:06,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:06,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:06,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:06,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:06,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:07,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:07,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:07,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:08,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:08,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:08,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:08,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:08,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:41:08,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:41:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:41:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:08,078 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-02 11:41:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:08,297 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:41:08,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:41:08,298 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-02 11:41:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:08,299 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:41:08,299 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:41:08,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:41:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:41:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:41:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:41:08,303 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-02 11:41:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:08,303 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:41:08,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:41:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:41:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:41:08,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:08,304 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-02 11:41:08,305 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:08,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:08,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-02 11:41:08,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:08,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:08,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:08,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:09,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:09,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:09,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:09,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:41:09,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:09,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:09,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:09,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:41:09,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:41:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:41:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:09,913 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-02 11:41:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:10,276 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:41:10,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:41:10,277 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 11:41:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:10,278 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:41:10,278 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:41:10,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:41:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:41:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:41:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 11:41:10,282 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-02 11:41:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:10,282 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 11:41:10,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:41:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 11:41:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:41:10,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:10,284 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-02 11:41:10,284 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:10,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:10,284 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-02 11:41:10,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:10,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:10,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:10,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:10,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:12,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:12,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:12,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:12,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:12,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:12,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:12,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:12,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:41:12,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:41:12,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:41:12,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:12,957 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-02 11:41:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:13,072 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:41:13,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:41:13,072 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-02 11:41:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:13,074 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:41:13,074 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:41:13,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:41:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:41:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:41:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:41:13,078 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-02 11:41:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:13,078 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:41:13,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:41:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:41:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:41:13,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:13,079 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-02 11:41:13,079 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:13,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-02 11:41:13,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:13,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:13,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:13,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:13,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:14,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:14,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:14,827 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:16,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:41:16,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:16,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:16,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:16,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:41:16,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:41:16,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:41:16,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:16,239 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-02 11:41:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:16,329 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:41:16,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:41:16,329 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 11:41:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:16,331 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:41:16,331 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:41:16,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:41:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:41:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:41:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-02 11:41:16,334 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-02 11:41:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:16,335 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-02 11:41:16,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:41:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-02 11:41:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:41:16,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:16,335 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-02 11:41:16,335 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:16,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-02 11:41:16,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:16,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:16,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:16,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:16,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:17,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:17,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:17,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:18,169 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:41:18,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:18,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:18,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:18,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:41:18,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:41:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:41:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:18,231 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-02 11:41:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:18,518 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:41:18,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:41:18,519 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-02 11:41:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:18,520 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:41:18,520 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:41:18,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:41:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:41:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:41:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 11:41:18,523 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-02 11:41:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:18,524 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 11:41:18,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:41:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 11:41:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:41:18,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:18,525 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-02 11:41:18,525 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:18,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-02 11:41:18,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:18,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:18,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:18,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:18,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:19,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:19,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:19,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:19,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:19,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:19,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:41:19,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:41:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:41:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:19,924 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-02 11:41:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:20,441 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 11:41:20,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:41:20,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 11:41:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:20,443 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:41:20,443 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:41:20,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:41:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 11:41:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 11:41:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-02 11:41:20,449 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-02 11:41:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:20,449 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-02 11:41:20,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:41:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-02 11:41:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:41:20,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:20,450 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-02 11:41:20,451 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:20,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:20,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-02 11:41:20,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:20,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:20,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:20,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:20,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:22,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:22,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:22,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:22,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:22,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:22,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:22,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:22,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:41:22,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:41:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:41:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:22,151 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-02 11:41:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:22,948 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 11:41:22,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:41:22,948 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-02 11:41:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:22,949 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:41:22,949 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:41:22,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:41:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:41:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:41:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-02 11:41:22,953 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-02 11:41:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:22,953 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-02 11:41:22,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:41:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-02 11:41:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:41:22,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:22,955 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-02 11:41:22,955 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:22,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-02 11:41:22,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:22,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:22,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:24,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:24,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:24,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:25,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:41:25,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:25,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:25,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:25,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:41:25,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:41:25,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:41:25,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:25,379 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-02 11:41:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:26,863 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 11:41:26,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:41:26,863 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-02 11:41:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:26,864 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:41:26,864 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 11:41:26,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 11:41:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 11:41:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 11:41:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-02 11:41:26,868 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-02 11:41:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:26,869 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-02 11:41:26,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:41:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-02 11:41:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 11:41:26,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:26,870 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-02 11:41:26,870 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:26,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-02 11:41:26,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:26,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:26,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:26,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:26,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:28,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:28,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:28,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:28,598 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:28,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:28,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:28,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:28,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:41:28,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:41:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:41:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:28,645 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-02 11:41:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:28,792 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 11:41:28,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:41:28,792 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-02 11:41:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:28,794 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:41:28,794 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:41:28,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:41:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 11:41:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:41:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-02 11:41:28,797 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-02 11:41:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:28,798 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-02 11:41:28,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:41:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-02 11:41:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:41:28,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:28,799 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-02 11:41:28,799 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:28,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-02 11:41:28,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:28,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:28,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:28,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:28,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:30,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:30,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:30,224 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:32,246 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:41:32,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:32,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:32,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:32,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:41:32,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:41:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:41:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:32,310 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-02 11:41:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:32,550 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 11:41:32,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:41:32,550 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-02 11:41:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:32,551 INFO L225 Difference]: With dead ends: 127 [2018-10-02 11:41:32,551 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 11:41:32,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 11:41:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 11:41:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 11:41:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-02 11:41:32,554 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-02 11:41:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:32,555 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-02 11:41:32,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:41:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-02 11:41:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 11:41:32,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:32,556 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-02 11:41:32,556 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:32,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-02 11:41:32,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:32,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:32,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:32,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:32,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:34,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:34,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:34,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:34,550 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:41:34,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:34,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:34,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:34,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:41:34,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:41:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:41:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:34,619 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-02 11:41:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:34,776 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 11:41:34,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:41:34,777 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-02 11:41:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:34,778 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:41:34,778 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:41:34,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:41:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:41:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:41:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-02 11:41:34,782 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-02 11:41:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:34,782 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-02 11:41:34,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:41:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-02 11:41:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:41:34,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:34,783 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-02 11:41:34,783 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:34,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:34,784 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-02 11:41:34,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:34,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:34,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:34,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:34,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:36,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:36,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:36,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:36,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:36,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:36,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:41:36,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:41:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:41:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:36,928 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-02 11:41:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:37,075 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 11:41:37,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:41:37,075 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-02 11:41:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:37,076 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:41:37,076 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 11:41:37,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 11:41:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 11:41:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:41:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-02 11:41:37,079 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-02 11:41:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:37,079 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-02 11:41:37,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:41:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-02 11:41:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:41:37,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:37,080 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-02 11:41:37,080 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:37,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-02 11:41:37,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:37,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:37,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:37,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:37,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:38,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:38,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:38,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:38,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:38,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:38,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:38,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:38,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:41:38,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:41:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:41:38,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:41:38,734 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-02 11:41:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:38,841 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 11:41:38,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:41:38,842 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-02 11:41:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:38,843 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:41:38,843 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:41:38,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:41:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:41:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:41:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:41:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-02 11:41:38,848 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-02 11:41:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:38,848 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-02 11:41:38,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:41:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-02 11:41:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:41:38,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:38,848 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-02 11:41:38,849 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:38,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-02 11:41:38,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:38,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:38,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:38,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:38,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:40,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:40,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:40,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:41,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:41:41,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:41,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:41,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:41,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:41:41,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:41:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:41:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:41:41,249 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-02 11:41:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:41,461 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 11:41:41,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:41:41,462 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-02 11:41:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:41,463 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:41:41,463 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:41:41,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:41:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:41:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 11:41:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:41:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-02 11:41:41,467 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-02 11:41:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:41,467 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-02 11:41:41,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:41:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-02 11:41:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 11:41:41,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:41,468 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-02 11:41:41,469 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:41,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-02 11:41:41,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:41,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:41,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:41,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:43,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:43,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:43,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:43,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:43,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:43,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:43,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:43,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:41:43,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:41:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:41:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:41:43,247 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-02 11:41:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:43,580 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 11:41:43,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:41:43,581 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-02 11:41:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:43,582 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:41:43,582 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:41:43,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:41:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:41:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 11:41:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:41:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-02 11:41:43,585 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-02 11:41:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:43,585 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-02 11:41:43,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:41:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-02 11:41:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:41:43,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:43,586 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-02 11:41:43,586 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:43,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:43,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-02 11:41:43,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:43,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:43,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:43,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:43,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:45,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:45,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:45,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:47,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:41:47,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:47,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:47,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:47,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:41:47,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:41:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:41:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:41:47,968 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-02 11:41:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:48,139 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 11:41:48,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:41:48,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-02 11:41:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:48,140 INFO L225 Difference]: With dead ends: 139 [2018-10-02 11:41:48,140 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:41:48,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:41:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:41:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 11:41:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 11:41:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-02 11:41:48,145 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-02 11:41:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:48,145 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-02 11:41:48,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:41:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-02 11:41:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 11:41:48,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:48,146 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-02 11:41:48,146 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:48,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:48,147 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-02 11:41:48,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:48,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:48,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:48,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:48,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:49,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:49,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:49,918 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:50,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:41:50,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:50,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:50,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:50,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:41:50,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:41:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:41:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:41:50,728 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-02 11:41:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:50,885 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 11:41:50,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:41:50,885 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-02 11:41:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:50,886 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:41:50,886 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:41:50,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:41:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:41:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:41:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:41:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-02 11:41:50,891 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-02 11:41:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:50,891 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-02 11:41:50,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:41:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-02 11:41:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:41:50,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:50,892 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-02 11:41:50,892 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:50,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:50,892 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-02 11:41:50,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:50,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:50,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:50,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:50,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:52,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:52,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:52,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:52,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:52,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:52,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:41:52,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:41:52,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:41:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:41:52,989 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-02 11:41:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:53,119 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 11:41:53,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:41:53,120 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-02 11:41:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:53,121 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:41:53,121 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 11:41:53,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:41:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 11:41:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 11:41:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 11:41:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-02 11:41:53,124 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-02 11:41:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:53,124 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-02 11:41:53,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:41:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-02 11:41:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:41:53,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:53,125 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-02 11:41:53,126 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:53,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-02 11:41:53,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:53,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:53,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:53,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:53,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:54,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:54,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:54,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:54,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:54,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:54,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:54,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:54,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:41:54,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:41:54,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:41:54,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:41:54,970 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-02 11:41:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:55,090 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 11:41:55,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:41:55,091 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-02 11:41:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:55,092 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:41:55,092 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:41:55,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:41:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:41:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:41:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:41:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-02 11:41:55,095 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-02 11:41:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:55,095 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-02 11:41:55,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:41:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-02 11:41:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:41:55,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:55,096 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-02 11:41:55,096 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:55,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-02 11:41:55,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:55,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:55,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:55,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:55,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:57,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:57,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:57,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:58,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:41:58,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:58,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:58,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:58,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:41:58,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:41:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:41:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:41:58,314 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-02 11:41:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:58,516 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 11:41:58,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:41:58,516 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-02 11:41:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:58,517 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:41:58,517 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 11:41:58,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:41:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 11:41:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 11:41:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 11:41:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-02 11:41:58,520 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-02 11:41:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:58,520 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-02 11:41:58,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:41:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-02 11:41:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 11:41:58,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:58,521 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-02 11:41:58,521 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:58,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-02 11:41:58,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:58,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:58,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:00,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:00,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:00,417 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:00,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:00,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:00,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:00,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:00,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:42:00,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:42:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:42:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:42:00,526 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-02 11:42:00,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:00,711 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 11:42:00,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:42:00,711 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-02 11:42:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:00,712 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:42:00,713 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:42:00,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:42:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:42:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 11:42:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:42:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-02 11:42:00,716 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-02 11:42:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:00,716 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-02 11:42:00,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:42:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-02 11:42:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:42:00,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:00,717 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-02 11:42:00,718 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:00,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-02 11:42:00,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:00,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:00,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:00,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:00,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:02,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:02,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:02,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:06,887 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:42:06,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:06,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:06,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:06,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:42:06,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:42:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:42:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:42:06,948 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-02 11:42:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:07,141 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 11:42:07,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:42:07,142 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-02 11:42:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:07,143 INFO L225 Difference]: With dead ends: 151 [2018-10-02 11:42:07,143 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 11:42:07,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:42:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 11:42:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-02 11:42:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:42:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-02 11:42:07,147 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-02 11:42:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:07,147 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-02 11:42:07,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:42:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-02 11:42:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 11:42:07,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:07,148 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-02 11:42:07,148 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:07,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-02 11:42:07,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:07,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:07,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:07,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:07,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:09,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:09,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:09,268 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:10,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 11:42:10,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:10,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:10,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:10,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:42:10,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:42:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:42:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:42:10,311 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-02 11:42:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:10,455 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 11:42:10,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:42:10,455 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-02 11:42:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:10,457 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:42:10,457 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:42:10,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:42:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:42:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 11:42:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:42:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-02 11:42:10,462 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-02 11:42:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:10,463 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-02 11:42:10,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:42:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-02 11:42:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:42:10,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:10,464 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-02 11:42:10,464 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:10,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-02 11:42:10,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:10,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:10,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:10,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:10,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:12,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:12,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:12,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:12,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:12,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:12,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:42:12,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:42:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:42:12,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:42:12,891 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-02 11:42:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:13,087 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 11:42:13,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:42:13,088 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-02 11:42:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:13,088 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:42:13,088 INFO L226 Difference]: Without dead ends: 153 [2018-10-02 11:42:13,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:42:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-02 11:42:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-02 11:42:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-02 11:42:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-02 11:42:13,093 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-02 11:42:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:13,093 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-02 11:42:13,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:42:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-02 11:42:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 11:42:13,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:13,094 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-02 11:42:13,094 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:13,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-02 11:42:13,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:13,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:13,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:13,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:13,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:15,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:15,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:15,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:15,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:15,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:15,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:15,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:15,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:42:15,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:42:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:42:15,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:42:15,355 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-02 11:42:15,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:15,728 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 11:42:15,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:42:15,729 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-02 11:42:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:15,729 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:42:15,730 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:42:15,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:42:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:42:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 11:42:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:42:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-02 11:42:15,733 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-02 11:42:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:15,734 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-02 11:42:15,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:42:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-02 11:42:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:42:15,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:15,734 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-02 11:42:15,735 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:15,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-02 11:42:15,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:15,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:15,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:15,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:15,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:18,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:18,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:18,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:19,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 11:42:19,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:19,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:19,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:19,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:42:19,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:42:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:42:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:42:19,669 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-02 11:42:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:19,912 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 11:42:19,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:42:19,912 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-02 11:42:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:19,913 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:42:19,913 INFO L226 Difference]: Without dead ends: 157 [2018-10-02 11:42:19,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:42:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-02 11:42:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-02 11:42:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 11:42:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-02 11:42:19,916 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-02 11:42:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:19,916 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-02 11:42:19,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:42:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-02 11:42:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-02 11:42:19,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:19,917 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-02 11:42:19,917 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:19,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-02 11:42:19,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:19,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:19,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:19,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:19,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:22,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:22,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:22,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:22,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:22,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:22,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:22,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:22,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:42:22,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:42:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:42:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:42:22,395 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-02 11:42:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:22,622 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 11:42:22,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:42:22,622 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-02 11:42:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:22,623 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:42:22,623 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:42:22,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:42:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:42:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-02 11:42:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:42:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-02 11:42:22,626 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-02 11:42:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:22,626 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-02 11:42:22,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 11:42:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-02 11:42:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:42:22,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:22,627 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-02 11:42:22,627 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:22,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:22,627 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-02 11:42:22,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:22,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:22,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:22,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:22,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:24,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:24,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:24,953 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:30,470 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 11:42:30,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:30,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:30,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:30,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:42:30,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:42:30,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:42:30,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:42:30,528 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-02 11:42:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:31,039 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-02 11:42:31,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:42:31,039 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-02 11:42:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:31,040 INFO L225 Difference]: With dead ends: 163 [2018-10-02 11:42:31,040 INFO L226 Difference]: Without dead ends: 161 [2018-10-02 11:42:31,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:42:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-02 11:42:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-02 11:42:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-02 11:42:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-02 11:42:31,045 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-02 11:42:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:31,045 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-02 11:42:31,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:42:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-02 11:42:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-02 11:42:31,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:31,046 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-02 11:42:31,046 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:31,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-02 11:42:31,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:31,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:31,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:31,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:31,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:34,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:34,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:34,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:35,566 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 11:42:35,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:35,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:35,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:35,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 11:42:35,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 11:42:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 11:42:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:42:35,629 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-02 11:42:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:35,777 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-02 11:42:35,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:42:35,778 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-02 11:42:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:35,779 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:42:35,779 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:42:35,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:42:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:42:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-02 11:42:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:42:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-02 11:42:35,783 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-02 11:42:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:35,784 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-02 11:42:35,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 11:42:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-02 11:42:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 11:42:35,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:35,785 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-02 11:42:35,785 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:35,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-02 11:42:35,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:35,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:35,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:35,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:35,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:38,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:38,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:38,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:38,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:38,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:38,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:42:38,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:42:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:42:38,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:42:38,555 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-02 11:42:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:38,799 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-02 11:42:38,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:42:38,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-02 11:42:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:38,800 INFO L225 Difference]: With dead ends: 167 [2018-10-02 11:42:38,800 INFO L226 Difference]: Without dead ends: 165 [2018-10-02 11:42:38,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:42:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-02 11:42:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-02 11:42:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-02 11:42:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-02 11:42:38,804 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-02 11:42:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:38,804 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-02 11:42:38,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:42:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-02 11:42:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 11:42:38,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:38,805 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-02 11:42:38,805 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:38,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:38,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-02 11:42:38,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:38,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:38,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:38,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:38,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:41,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:41,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:41,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:41,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:41,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:41,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:41,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:41,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 11:42:41,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:42:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:42:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:42:41,385 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-02 11:42:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:41,562 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-02 11:42:41,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:42:41,562 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-02 11:42:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:41,564 INFO L225 Difference]: With dead ends: 169 [2018-10-02 11:42:41,564 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:42:41,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:42:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:42:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-02 11:42:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:42:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-02 11:42:41,567 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-02 11:42:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:41,567 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-02 11:42:41,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:42:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-02 11:42:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 11:42:41,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:41,568 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-02 11:42:41,568 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:41,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-02 11:42:41,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:41,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:41,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:41,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:41,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:44,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:44,459 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 [2018-10-02 11:42:44,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:46,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-02 11:42:46,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:46,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:46,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:46,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:42:46,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:42:46,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:42:46,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:42:46,429 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-02 11:42:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:46,612 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-02 11:42:46,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:42:46,613 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-02 11:42:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:46,614 INFO L225 Difference]: With dead ends: 171 [2018-10-02 11:42:46,614 INFO L226 Difference]: Without dead ends: 169 [2018-10-02 11:42:46,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:42:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-02 11:42:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-02 11:42:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-02 11:42:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-02 11:42:46,618 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-02 11:42:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:46,619 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-02 11:42:46,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:42:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-02 11:42:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-02 11:42:46,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:46,619 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-02 11:42:46,620 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:46,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-02 11:42:46,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:46,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:46,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:46,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:46,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:49,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:49,480 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 [2018-10-02 11:42:49,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:49,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:49,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:49,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:49,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:49,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 11:42:49,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 11:42:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 11:42:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:42:49,635 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-02 11:42:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:49,959 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-02 11:42:49,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:42:49,959 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-02 11:42:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:49,960 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:42:49,960 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:42:49,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:42:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:42:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-02 11:42:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 11:42:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-02 11:42:49,964 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-02 11:42:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:49,964 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-02 11:42:49,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 11:42:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-02 11:42:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:42:49,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:49,965 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-02 11:42:49,965 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:49,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-02 11:42:49,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:49,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:49,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:49,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:52,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:52,505 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 [2018-10-02 11:42:52,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:00,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-02 11:43:00,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:00,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:00,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:00,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:43:00,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:43:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:43:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:00,095 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-02 11:43:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:00,395 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-02 11:43:00,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:43:00,396 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-02 11:43:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:00,396 INFO L225 Difference]: With dead ends: 175 [2018-10-02 11:43:00,396 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 11:43:00,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 11:43:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-02 11:43:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-02 11:43:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-02 11:43:00,401 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-02 11:43:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:00,401 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-02 11:43:00,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:43:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-02 11:43:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-02 11:43:00,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:00,403 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-02 11:43:00,403 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:00,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-02 11:43:00,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:00,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:00,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:00,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:00,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:03,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:03,378 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 [2018-10-02 11:43:03,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:05,052 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-02 11:43:05,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:05,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:05,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:05,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 11:43:05,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 11:43:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 11:43:05,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:43:05,114 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-02 11:43:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:05,419 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-02 11:43:05,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:43:05,419 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-02 11:43:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:05,420 INFO L225 Difference]: With dead ends: 177 [2018-10-02 11:43:05,420 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 11:43:05,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:43:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 11:43:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-02 11:43:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:43:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-02 11:43:05,424 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-02 11:43:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:05,424 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-02 11:43:05,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 11:43:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-02 11:43:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 11:43:05,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:05,425 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-02 11:43:05,426 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:05,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:05,426 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-02 11:43:05,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:05,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:05,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:05,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:08,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:08,501 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 [2018-10-02 11:43:08,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:08,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:08,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:08,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:43:08,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:43:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:43:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:43:08,630 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-02 11:43:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:08,933 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-02 11:43:08,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:43:08,933 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-02 11:43:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:08,934 INFO L225 Difference]: With dead ends: 179 [2018-10-02 11:43:08,934 INFO L226 Difference]: Without dead ends: 177 [2018-10-02 11:43:08,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:43:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-02 11:43:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-02 11:43:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-02 11:43:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-02 11:43:08,938 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-02 11:43:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:08,938 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-02 11:43:08,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:43:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-02 11:43:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-02 11:43:08,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:08,939 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-02 11:43:08,939 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:08,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-02 11:43:08,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:08,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:08,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:08,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:08,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:11,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:11,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:43:11,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:11,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:11,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:11,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:11,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:11,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 11:43:11,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:43:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:43:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:43:11,803 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-02 11:43:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:11,958 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-02 11:43:11,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:43:11,958 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-02 11:43:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:11,959 INFO L225 Difference]: With dead ends: 181 [2018-10-02 11:43:11,960 INFO L226 Difference]: Without dead ends: 179 [2018-10-02 11:43:11,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:43:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-02 11:43:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-02 11:43:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 11:43:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-02 11:43:11,964 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-02 11:43:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:11,964 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-02 11:43:11,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:43:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-02 11:43:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 11:43:11,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:11,965 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-02 11:43:11,965 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:11,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-02 11:43:11,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:11,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:11,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:11,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:11,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:15,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:15,134 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 [2018-10-02 11:43:15,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:17,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-02 11:43:17,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:17,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:17,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:17,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:43:17,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:43:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:43:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:43:17,708 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-02 11:43:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:18,009 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-02 11:43:18,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:43:18,009 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-02 11:43:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:18,010 INFO L225 Difference]: With dead ends: 183 [2018-10-02 11:43:18,010 INFO L226 Difference]: Without dead ends: 181 [2018-10-02 11:43:18,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:43:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-02 11:43:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-02 11:43:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-02 11:43:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-02 11:43:18,013 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-02 11:43:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:18,014 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-02 11:43:18,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:43:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-02 11:43:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-02 11:43:18,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:18,014 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-02 11:43:18,015 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:18,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-02 11:43:18,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:18,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:18,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:18,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:21,111 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 [2018-10-02 11:43:21,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:21,184 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:21,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:21,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:21,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 11:43:21,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 11:43:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 11:43:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:43:21,244 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-02 11:43:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:21,452 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-02 11:43:21,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:43:21,452 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-02 11:43:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:21,454 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:43:21,454 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:43:21,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:43:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:43:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-02 11:43:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-02 11:43:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-02 11:43:21,459 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-02 11:43:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:21,459 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-02 11:43:21,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 11:43:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-02 11:43:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:43:21,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:21,460 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-02 11:43:21,460 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:21,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:21,460 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-02 11:43:21,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:21,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:21,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:21,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:24,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:24,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:43:24,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:34,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-02 11:43:34,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:34,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:34,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:34,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 11:43:34,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:43:34,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:43:34,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:43:34,215 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-02 11:43:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:34,554 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-02 11:43:34,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 11:43:34,555 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-02 11:43:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:34,555 INFO L225 Difference]: With dead ends: 187 [2018-10-02 11:43:34,555 INFO L226 Difference]: Without dead ends: 185 [2018-10-02 11:43:34,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:43:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-02 11:43:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-02 11:43:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-02 11:43:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-02 11:43:34,559 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-02 11:43:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:34,560 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-02 11:43:34,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:43:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-02 11:43:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-02 11:43:34,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:34,561 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-02 11:43:34,561 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:34,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-02 11:43:34,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:34,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:34,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:34,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:34,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:37,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:37,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:43:37,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:39,679 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-02 11:43:39,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:39,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:39,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:39,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 11:43:39,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 11:43:39,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 11:43:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:43:39,743 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-02 11:43:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:39,991 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-02 11:43:39,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:43:39,991 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-02 11:43:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:39,992 INFO L225 Difference]: With dead ends: 189 [2018-10-02 11:43:39,992 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:43:39,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:43:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:43:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-02 11:43:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 11:43:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-02 11:43:39,997 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-02 11:43:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:39,997 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-02 11:43:39,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 11:43:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-02 11:43:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-02 11:43:39,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:39,998 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-02 11:43:39,999 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:39,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-02 11:43:39,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:39,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:40,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:40,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:40,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:43,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:43,097 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 [2018-10-02 11:43:43,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:43,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:43,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:43,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 11:43:43,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:43:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:43:43,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:43:43,234 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-02 11:43:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:43,433 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-02 11:43:43,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 11:43:43,433 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-02 11:43:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:43,434 INFO L225 Difference]: With dead ends: 191 [2018-10-02 11:43:43,435 INFO L226 Difference]: Without dead ends: 189 [2018-10-02 11:43:43,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:43:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-02 11:43:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-02 11:43:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-02 11:43:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-02 11:43:43,439 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-02 11:43:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:43,439 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-02 11:43:43,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:43:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-02 11:43:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:43:43,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:43,440 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-02 11:43:43,440 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:43,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-02 11:43:43,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:43,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:43,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:43,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:43,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:46,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:46,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:43:46,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:47,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:47,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:47,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:47,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 11:43:47,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 11:43:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 11:43:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:43:47,082 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-02 11:43:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:47,259 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-02 11:43:47,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:43:47,260 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-02 11:43:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:47,261 INFO L225 Difference]: With dead ends: 193 [2018-10-02 11:43:47,261 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 11:43:47,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:43:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 11:43:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-02 11:43:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 11:43:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-02 11:43:47,265 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-02 11:43:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:47,265 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-02 11:43:47,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 11:43:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-02 11:43:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-02 11:43:47,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:47,266 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-02 11:43:47,267 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:47,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:47,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-02 11:43:47,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:47,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:47,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:47,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:51,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:51,525 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 [2018-10-02 11:43:51,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:54,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-02 11:43:54,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:54,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:54,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:54,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 11:43:54,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:43:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:43:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:43:54,852 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-02 11:43:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:55,059 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-02 11:43:55,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 11:43:55,059 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-02 11:43:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:55,060 INFO L225 Difference]: With dead ends: 195 [2018-10-02 11:43:55,060 INFO L226 Difference]: Without dead ends: 193 [2018-10-02 11:43:55,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:43:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-02 11:43:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-02 11:43:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-02 11:43:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-02 11:43:55,064 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-02 11:43:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:55,064 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-02 11:43:55,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:43:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-02 11:43:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-02 11:43:55,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:55,065 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-02 11:43:55,065 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:55,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-02 11:43:55,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:55,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:55,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:55,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:55,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:58,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:58,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:43:58,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:58,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:58,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:58,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:58,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:58,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 11:43:58,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 11:43:58,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 11:43:58,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:43:58,536 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-02 11:43:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:58,860 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-02 11:43:58,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:43:58,861 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-02 11:43:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:58,861 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:43:58,861 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:43:58,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:43:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:43:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-02 11:43:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-02 11:43:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-02 11:43:58,865 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-02 11:43:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:58,865 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-02 11:43:58,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 11:43:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-02 11:43:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 11:43:58,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:58,866 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-02 11:43:58,866 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:58,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-02 11:43:58,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:58,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:58,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:58,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:58,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:02,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:02,466 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 [2018-10-02 11:44:02,475 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:15,790 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-02 11:44:15,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:15,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:15,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:15,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 11:44:15,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:44:15,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:44:15,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:44:15,865 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-02 11:44:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:16,196 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-02 11:44:16,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 11:44:16,197 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-02 11:44:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:16,198 INFO L225 Difference]: With dead ends: 199 [2018-10-02 11:44:16,198 INFO L226 Difference]: Without dead ends: 197 [2018-10-02 11:44:16,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:44:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-02 11:44:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-02 11:44:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-02 11:44:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-02 11:44:16,203 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-02 11:44:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:16,203 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-02 11:44:16,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:44:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-02 11:44:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-02 11:44:16,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:16,205 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-02 11:44:16,205 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:16,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-02 11:44:16,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:16,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:19,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:19,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:44:19,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:22,328 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-02 11:44:22,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:22,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:22,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:22,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-02 11:44:22,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-02 11:44:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-02 11:44:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:44:22,399 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-02 11:44:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:22,627 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-02 11:44:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 11:44:22,628 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-02 11:44:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:22,629 INFO L225 Difference]: With dead ends: 201 [2018-10-02 11:44:22,629 INFO L226 Difference]: Without dead ends: 199 [2018-10-02 11:44:22,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:44:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-02 11:44:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-02 11:44:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 11:44:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-02 11:44:22,633 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-02 11:44:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:22,633 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-02 11:44:22,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-02 11:44:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-02 11:44:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-02 11:44:22,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:22,634 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-02 11:44:22,634 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:22,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-02 11:44:22,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:22,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:22,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:22,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:22,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:44:25,670 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:44:25,675 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:44:25,675 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:44:25 BoogieIcfgContainer [2018-10-02 11:44:25,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:44:25,676 INFO L168 Benchmark]: Toolchain (without parser) took 244445.31 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -30.4 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 440.6 MB). Peak memory consumption was 410.2 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:25,678 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:25,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:25,679 INFO L168 Benchmark]: Boogie Preprocessor took 19.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:25,679 INFO L168 Benchmark]: RCFGBuilder took 285.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:25,679 INFO L168 Benchmark]: TraceAbstraction took 244092.14 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -30.4 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 419.5 MB). Peak memory consumption was 389.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:25,681 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 285.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244092.14 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -30.4 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 419.5 MB). Peak memory consumption was 389.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 199 with TraceHistMax 98, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 244.0s OverallTime, 98 OverallIterations, 98 TraceHistogramMax, 18.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 388 SDtfs, 0 SDslu, 7887 SDs, 0 SdLazy, 7984 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14450 GetRequests, 9697 SyntacticMatches, 0 SemanticMatches, 4753 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 137.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 74.4s SatisfiabilityAnalysisTime, 141.8s InterpolantComputationTime, 19396 NumberOfCodeBlocks, 19396 NumberOfCodeBlocksAsserted, 2609 NumberOfCheckSat, 19203 ConstructedInterpolants, 0 QuantifiedInterpolants, 7490901 SizeOfPredicates, 96 NumberOfNonLiveVariables, 24528 ConjunctsInSsa, 4848 ConjunctsInUnsatCore, 193 InterpolantComputations, 1 PerfectInterpolantSequences, 0/608384 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/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-44-25-690.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-44-25-690.csv Completed graceful shutdown