java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:52:44,923 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:52:44,925 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:52:44,937 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:52:44,937 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:52:44,940 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:52:44,942 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:52:44,946 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:52:44,947 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:52:44,953 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:52:44,954 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:52:44,996 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 11:52:45,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:52:45,018 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:52:45,019 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:52:45,020 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:52:45,021 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:52:45,021 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:52:45,021 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:52:45,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:52:45,022 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:52:45,022 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:52:45,022 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:52:45,023 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:52:45,023 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:52:45,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:52:45,023 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:52:45,027 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:52:45,027 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:52:45,028 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:52:45,028 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:52:45,028 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:52:45,028 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:52:45,030 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:52:45,030 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:52:45,030 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:52:45,030 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:52:45,031 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:52:45,031 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:52:45,031 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:52:45,031 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:52:45,031 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:52:45,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:52:45,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:52:45,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:52:45,124 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:52:45,125 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:52:45,125 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-10-02 11:52:45,126 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-10-02 11:52:45,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:52:45,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:52:45,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:52:45,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:52:45,183 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:52:45,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,224 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:52:45,225 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:52:45,225 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:52:45,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:52:45,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:52:45,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:52:45,229 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:52:45,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/1) ... [2018-10-02 11:52:45,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:52:45,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:52:45,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:52:45,256 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:52:45,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (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 11:52:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:52:45,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:52:45,545 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:52:45,546 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:52:45 BoogieIcfgContainer [2018-10-02 11:52:45,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:52:45,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:52:45,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:52:45,551 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:52:45,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:52:45" (1/2) ... [2018-10-02 11:52:45,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40685104 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:52:45, skipping insertion in model container [2018-10-02 11:52:45,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:52:45" (2/2) ... [2018-10-02 11:52:45,555 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-10-02 11:52:45,565 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:52:45,573 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:52:45,627 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:52:45,628 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:52:45,628 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:52:45,628 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:52:45,628 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:52:45,628 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:52:45,629 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:52:45,629 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:52:45,629 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:52:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 11:52:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:52:45,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:45,653 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:52:45,655 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:45,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:45,662 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-02 11:52:45,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:45,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:45,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:45,807 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 11:52:45,810 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:52:45,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 11:52:45,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:52:45,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:52:45,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:52:45,832 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 11:52:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:45,891 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:52:45,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:52:45,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:52:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:45,907 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:52:45,907 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 11:52:45,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:52:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 11:52:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 11:52:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:52:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 11:52:45,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-02 11:52:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:45,978 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 11:52:45,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:52:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 11:52:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:52:45,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:45,979 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 11:52:45,979 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:45,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-02 11:52:45,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:45,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:45,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:45,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:46,098 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 11:52:46,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:46,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:46,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:46,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:46,462 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 11:52:46,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:46,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-02 11:52:46,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:52:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:52:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:52:46,500 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-02 11:52:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:46,631 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:52:46,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:52:46,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-02 11:52:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:46,632 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:52:46,633 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:52:46,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:52:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:52:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:52:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:52:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 11:52:46,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-02 11:52:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:46,637 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 11:52:46,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:52:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 11:52:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:52:46,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:46,639 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-02 11:52:46,639 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:46,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:46,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-02 11:52:46,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:46,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:46,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:46,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:46,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:46,780 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 11:52:46,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:46,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:46,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:46,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:46,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:46,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:47,000 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 11:52:47,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:47,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-02 11:52:47,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:52:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:52:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:52:47,022 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-02 11:52:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:47,162 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:52:47,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:52:47,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-02 11:52:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:47,164 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:52:47,164 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:52:47,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:52:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:52:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:52:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:52:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:52:47,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-02 11:52:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:47,172 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:52:47,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:52:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:52:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:52:47,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:47,173 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-02 11:52:47,174 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:47,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-02 11:52:47,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:47,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:47,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:47,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:47,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:47,277 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 11:52:47,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:47,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:47,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:47,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:52:47,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:47,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:47,670 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 11:52:47,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:47,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-02 11:52:47,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:52:47,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:52:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:52:47,692 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-02 11:52:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:47,749 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:52:47,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:52:47,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-02 11:52:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:47,751 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:52:47,751 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:52:47,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:52:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:52:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:52:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:52:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 11:52:47,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-02 11:52:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:47,757 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 11:52:47,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:52:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 11:52:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:52:47,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:47,757 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-02 11:52:47,758 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:47,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:47,758 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-02 11:52:47,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:47,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:47,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:47,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:47,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:47,939 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 11:52:47,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:47,940 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 11:52:47,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:47,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:47,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:47,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:48,107 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 11:52:48,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:48,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 11:52:48,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:52:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:52:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:52:48,130 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-02 11:52:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:48,223 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:52:48,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:52:48,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-02 11:52:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:48,225 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:52:48,225 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:52:48,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:52:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:52:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:52:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:52:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 11:52:48,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-02 11:52:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:48,233 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 11:52:48,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:52:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 11:52:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:52:48,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:48,234 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-02 11:52:48,234 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:48,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:48,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-02 11:52:48,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:48,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:48,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:48,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:48,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:48,593 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 11:52:48,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:48,593 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 11:52:48,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:48,671 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:52:48,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:48,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:48,787 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 11:52:48,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:48,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-02 11:52:48,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:52:48,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:52:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:52:48,809 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-02 11:52:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:48,892 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:52:48,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:52:48,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-02 11:52:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:48,895 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:52:48,896 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:52:48,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:52:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:52:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:52:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:52:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 11:52:48,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-02 11:52:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:48,901 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 11:52:48,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:52:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 11:52:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:52:48,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:48,902 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-02 11:52:48,902 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:48,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-02 11:52:48,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:48,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:48,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:49,022 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 11:52:49,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:49,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:49,031 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:49,039 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:52:49,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:49,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:49,180 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 11:52:49,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:49,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-02 11:52:49,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:52:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:52:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:52:49,209 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-02 11:52:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:49,265 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:52:49,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:52:49,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-02 11:52:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:49,267 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:52:49,267 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:52:49,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:52:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:52:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:52:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:52:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 11:52:49,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-02 11:52:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:49,273 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 11:52:49,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:52:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 11:52:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:52:49,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:49,274 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-02 11:52:49,275 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:49,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:49,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-02 11:52:49,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:49,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:49,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:49,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:49,452 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 11:52:49,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:49,453 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 11:52:49,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:49,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:49,791 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 11:52:49,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:49,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 11:52:49,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:52:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:52:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:52:49,813 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-02 11:52:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:49,868 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:52:49,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:52:49,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-02 11:52:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:49,870 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:52:49,870 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:52:49,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:52:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:52:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:52:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:52:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 11:52:49,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-02 11:52:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:49,875 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 11:52:49,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:52:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 11:52:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:52:49,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:49,877 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-02 11:52:49,877 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:49,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-02 11:52:49,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:49,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:49,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:49,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:50,026 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 11:52:50,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:50,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:50,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:50,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:50,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:50,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:50,208 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 11:52:50,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:50,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-02 11:52:50,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:52:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:52:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:52:50,231 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-02 11:52:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:50,302 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:52:50,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:52:50,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-02 11:52:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:50,305 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:52:50,305 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:52:50,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:52:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:52:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:52:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:52:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 11:52:50,310 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-02 11:52:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:50,311 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 11:52:50,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:52:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 11:52:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:52:50,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:50,312 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-02 11:52:50,312 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:50,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-02 11:52:50,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:50,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:50,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:50,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:50,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:50,505 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 11:52:50,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:50,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:50,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:50,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:52:50,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:50,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:50,750 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 11:52:50,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:50,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-02 11:52:50,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:52:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:52:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:52:50,771 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-02 11:52:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:51,052 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:52:51,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:52:51,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-02 11:52:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:51,053 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:52:51,053 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:52:51,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:52:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:52:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:52:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:52:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 11:52:51,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-02 11:52:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:51,064 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 11:52:51,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:52:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 11:52:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:52:51,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:51,065 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-02 11:52:51,065 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:51,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-02 11:52:51,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:51,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:51,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:51,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:51,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:51,298 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 11:52:51,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:51,298 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 11:52:51,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:51,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:51,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:51,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:51,530 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 11:52:51,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:51,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 11:52:51,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:52:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:52:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:52:51,553 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-02 11:52:51,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:51,617 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:52:51,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:52:51,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-02 11:52:51,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:51,619 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:52:51,619 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:52:51,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:52:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:52:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:52:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:52:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 11:52:51,625 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-02 11:52:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:51,626 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 11:52:51,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:52:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 11:52:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:52:51,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:51,627 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-02 11:52:51,627 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:51,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-02 11:52:51,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:51,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:51,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:51,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:51,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:51,886 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 11:52:51,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:51,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:51,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:51,924 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:52:51,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:51,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:52,406 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 11:52:52,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:52,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 11:52:52,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:52:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:52:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:52:52,430 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-02 11:52:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:52,530 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:52:52,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:52:52,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-02 11:52:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:52,531 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:52:52,531 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:52:52,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:52:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:52:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:52:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:52:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 11:52:52,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-02 11:52:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:52,537 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 11:52:52,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:52:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 11:52:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:52:52,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:52,538 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-02 11:52:52,538 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:52,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-02 11:52:52,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:52,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:52,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:52,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:52,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:52,900 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 11:52:52,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:52,901 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 11:52:52,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:52,946 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:52:52,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:52,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:53,210 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 11:52:53,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:53,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-02 11:52:53,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:52:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:52:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:52:53,232 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-02 11:52:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:53,307 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:52:53,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:52:53,307 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-02 11:52:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:53,308 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:52:53,308 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:52:53,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:52:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:52:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:52:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:52:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 11:52:53,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-02 11:52:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:53,315 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 11:52:53,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:52:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 11:52:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:52:53,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:53,316 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-02 11:52:53,316 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:53,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-02 11:52:53,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:53,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:53,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:53,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:53,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:53,559 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 11:52:53,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:53,560 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 11:52:53,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:53,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:53,938 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 11:52:53,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:53,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 11:52:53,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:52:53,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:52:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:52:53,960 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-02 11:52:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:54,037 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:52:54,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:52:54,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-02 11:52:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:54,038 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:52:54,038 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:52:54,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:52:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:52:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:52:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:52:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 11:52:54,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-02 11:52:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:54,045 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 11:52:54,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:52:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 11:52:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:52:54,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:54,046 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-02 11:52:54,046 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:54,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:54,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-02 11:52:54,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:54,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:54,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:54,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:54,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:54,260 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 11:52:54,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:54,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:54,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:52:54,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:52:54,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:54,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:54,548 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 11:52:54,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:54,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-02 11:52:54,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:52:54,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:52:54,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:52:54,571 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-02 11:52:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:54,695 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:52:54,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:52:54,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-02 11:52:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:54,697 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:52:54,697 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:52:54,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:52:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:52:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:52:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:52:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 11:52:54,704 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-02 11:52:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:54,704 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 11:52:54,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:52:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 11:52:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:52:54,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:54,705 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-02 11:52:54,706 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:54,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:54,706 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-02 11:52:54,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:54,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:54,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:54,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:54,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:54,916 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 11:52:54,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:54,917 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 11:52:54,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:52:55,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:52:55,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:55,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:55,498 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 11:52:55,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:55,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-02 11:52:55,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:52:55,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:52:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:52:55,520 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-02 11:52:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:55,658 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:52:55,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:52:55,659 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-02 11:52:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:55,660 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:52:55,660 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:52:55,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:52:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:52:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:52:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:52:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 11:52:55,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-02 11:52:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:55,666 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 11:52:55,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:52:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 11:52:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:52:55,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:55,666 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-02 11:52:55,667 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:55,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-02 11:52:55,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:55,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:55,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:55,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:55,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:55,879 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 11:52:55,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:55,880 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 11:52:55,887 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:52:55,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:52:55,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:55,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:56,196 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 11:52:56,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:56,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 11:52:56,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:52:56,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:52:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:52:56,218 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-02 11:52:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:56,293 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:52:56,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:52:56,293 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-02 11:52:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:56,294 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:52:56,294 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:52:56,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:52:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:52:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:52:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:52:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 11:52:56,300 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-02 11:52:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:56,300 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 11:52:56,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:52:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 11:52:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:52:56,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:56,301 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-02 11:52:56,301 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:56,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-02 11:52:56,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:56,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:56,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:56,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:56,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:57,351 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 11:52:57,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:57,352 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 11:52:57,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:52:57,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:52:57,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:57,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:57,809 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 11:52:57,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:57,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-02 11:52:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:52:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:52:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:52:57,831 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-02 11:52:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:58,158 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:52:58,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:52:58,159 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-02 11:52:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:58,160 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:52:58,160 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:52:58,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:52:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:52:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:52:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:52:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 11:52:58,167 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-02 11:52:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:58,167 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 11:52:58,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:52:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 11:52:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:52:58,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:58,168 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-02 11:52:58,168 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:58,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-02 11:52:58,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:58,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:58,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:58,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:58,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:58,473 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 11:52:58,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:58,473 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 11:52:58,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:52:58,497 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:52:58,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:52:58,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:52:59,287 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 11:52:59,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:52:59,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-02 11:52:59,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:52:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:52:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:52:59,309 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-02 11:52:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:52:59,403 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:52:59,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:52:59,403 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-02 11:52:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:52:59,404 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:52:59,405 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:52:59,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:52:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:52:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:52:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:52:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 11:52:59,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-02 11:52:59,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:52:59,411 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 11:52:59,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:52:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 11:52:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:52:59,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:52:59,412 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-02 11:52:59,412 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:52:59,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:52:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-02 11:52:59,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:52:59,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:52:59,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:59,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:52:59,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:52:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:59,708 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 11:52:59,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:52:59,708 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 11:52:59,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:52:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:52:59,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:00,515 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 11:53:00,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:00,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 11:53:00,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:53:00,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:53:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:53:00,537 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-02 11:53:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:00,671 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:53:00,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:53:00,672 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-02 11:53:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:00,672 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:53:00,673 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:53:00,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:53:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:53:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:53:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:53:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 11:53:00,679 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-02 11:53:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:00,679 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 11:53:00,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:53:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 11:53:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:53:00,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:00,680 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-02 11:53:00,681 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:00,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-02 11:53:00,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:00,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:00,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:00,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:00,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:01,470 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 11:53:01,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:01,471 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 11:53:01,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:01,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:01,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:01,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:01,848 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 11:53:01,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:01,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-02 11:53:01,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:53:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:53:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:01,872 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-02 11:53:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:01,985 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:53:01,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:53:01,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-02 11:53:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:01,986 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:53:01,986 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:53:01,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:53:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:53:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:53:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 11:53:01,992 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-02 11:53:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:01,992 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 11:53:01,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:53:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 11:53:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:53:01,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:01,994 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-02 11:53:01,994 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:01,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-02 11:53:01,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:01,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:01,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:01,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:01,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:02,835 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 11:53:02,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:02,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:02,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:02,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:53:02,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:02,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:03,269 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 11:53:03,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:03,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-02 11:53:03,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:53:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:53:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:03,291 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-02 11:53:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:03,443 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:53:03,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:53:03,446 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-02 11:53:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:03,447 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:53:03,447 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:53:03,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:53:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:53:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:53:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 11:53:03,452 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-02 11:53:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:03,452 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 11:53:03,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:53:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 11:53:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:53:03,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:03,453 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-02 11:53:03,453 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:03,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-02 11:53:03,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:03,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:03,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:03,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:03,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:03,800 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 11:53:03,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:03,800 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 11:53:03,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:03,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:03,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:03,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:04,355 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 11:53:04,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:04,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 11:53:04,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:53:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:53:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:04,378 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-02 11:53:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:04,478 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:53:04,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:53:04,478 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-02 11:53:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:04,479 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:53:04,480 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:53:04,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:53:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:53:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:53:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 11:53:04,486 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-02 11:53:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:04,486 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 11:53:04,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:53:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 11:53:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:53:04,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:04,487 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-02 11:53:04,488 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:04,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-02 11:53:04,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:04,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:04,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:04,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:05,394 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 11:53:05,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:05,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:05,403 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:05,423 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:53:05,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:05,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:05,923 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 11:53:05,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:05,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 11:53:05,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:53:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:53:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:53:05,944 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-02 11:53:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:06,102 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:53:06,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:53:06,103 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-02 11:53:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:06,103 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:53:06,104 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:53:06,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:53:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:53:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:53:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:53:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 11:53:06,110 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-02 11:53:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:06,110 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 11:53:06,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:53:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 11:53:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:53:06,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:06,111 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-02 11:53:06,111 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:06,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-02 11:53:06,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:06,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:06,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:06,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:06,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:06,679 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 11:53:06,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:06,679 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 11:53:06,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:06,711 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:53:06,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:06,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:07,282 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 11:53:07,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:07,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-02 11:53:07,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:53:07,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:53:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:53:07,304 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-02 11:53:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:07,472 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:53:07,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:53:07,472 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-02 11:53:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:07,473 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:53:07,473 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:53:07,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:53:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:53:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:53:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:53:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 11:53:07,477 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-02 11:53:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:07,477 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 11:53:07,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:53:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 11:53:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:53:07,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:07,478 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-02 11:53:07,478 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:07,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-02 11:53:07,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:07,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:07,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:07,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,889 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 11:53:07,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:07,889 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 11:53:07,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:08,344 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 11:53:08,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:08,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 11:53:08,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:53:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:53:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:53:08,365 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-02 11:53:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:08,496 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:53:08,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:53:08,496 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-02 11:53:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:08,497 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:53:08,497 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:53:08,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:53:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:53:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:53:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:53:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 11:53:08,504 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-02 11:53:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:08,504 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 11:53:08,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:53:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 11:53:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:53:08,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:08,505 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-02 11:53:08,505 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:08,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-02 11:53:08,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:08,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:08,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:09,079 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 11:53:09,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:09,080 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 11:53:09,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:09,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:09,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:09,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:09,595 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 11:53:09,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:09,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-02 11:53:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:53:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:53:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:53:09,618 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-02 11:53:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:09,753 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:53:09,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:53:09,754 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-02 11:53:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:09,755 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:53:09,755 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:53:09,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:53:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:53:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:53:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:53:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 11:53:09,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-02 11:53:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:09,761 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 11:53:09,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:53:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 11:53:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:53:09,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:09,762 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-02 11:53:09,762 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:09,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:09,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-02 11:53:09,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:09,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:09,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:09,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:10,362 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 11:53:10,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:10,362 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 11:53:10,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:10,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:53:10,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:10,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:10,901 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 11:53:10,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:10,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-02 11:53:10,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:53:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:53:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:53:10,923 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-02 11:53:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,038 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:53:11,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:53:11,038 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-02 11:53:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,039 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:53:11,039 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:53:11,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:53:11,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:53:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:53:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:53:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 11:53:11,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-02 11:53:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,044 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 11:53:11,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:53:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 11:53:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:53:11,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,045 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-02 11:53:11,045 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-02 11:53:11,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:11,551 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 11:53:11,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:11,551 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 11:53:11,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:11,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:11,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:11,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:12,889 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 11:53:12,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:12,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 11:53:12,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:53:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:53:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:53:12,910 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-02 11:53:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:13,249 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:53:13,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:53:13,249 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-02 11:53:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:13,250 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:53:13,250 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:53:13,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:53:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:53:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 11:53:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:53:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 11:53:13,257 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-02 11:53:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:13,257 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 11:53:13,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:53:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 11:53:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 11:53:13,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:13,258 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-02 11:53:13,258 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:13,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-02 11:53:13,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:13,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:13,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:13,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:13,778 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 11:53:13,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:13,778 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 11:53:13,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:13,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:53:13,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:13,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:14,509 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 11:53:14,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:14,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-02 11:53:14,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:53:14,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:53:14,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:53:14,531 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-02 11:53:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:14,676 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:53:14,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:53:14,676 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-02 11:53:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:14,678 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:53:14,678 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:53:14,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:53:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:53:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:53:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:53:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 11:53:14,682 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-02 11:53:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:14,682 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 11:53:14,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:53:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 11:53:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:53:14,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:14,683 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-02 11:53:14,683 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:14,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-02 11:53:14,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:14,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:14,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:14,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:14,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:15,165 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 11:53:15,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:15,166 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 11:53:15,174 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:15,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:53:15,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:15,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:15,903 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 11:53:15,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:15,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-02 11:53:15,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:53:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:53:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:53:15,924 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-02 11:53:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:16,046 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:53:16,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:53:16,047 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-02 11:53:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:16,048 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:53:16,048 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 11:53:16,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:53:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 11:53:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 11:53:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:53:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 11:53:16,053 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-02 11:53:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:16,053 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 11:53:16,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:53:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 11:53:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:53:16,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:16,054 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-02 11:53:16,054 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:16,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-02 11:53:16,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:16,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:16,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:16,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:16,625 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 11:53:16,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:16,625 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 11:53:16,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:16,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:17,310 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 11:53:17,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:17,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 11:53:17,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:53:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:53:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:53:17,332 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-02 11:53:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:17,541 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:53:17,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:53:17,541 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-02 11:53:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:17,542 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:53:17,542 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:53:17,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:53:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:53:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:53:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:53:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 11:53:17,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-02 11:53:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:17,548 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 11:53:17,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:53:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 11:53:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 11:53:17,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:17,549 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-02 11:53:17,549 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:17,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-02 11:53:17,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:17,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:17,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:17,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:17,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:18,230 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 11:53:18,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:18,231 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 11:53:18,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:18,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:18,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:18,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:18,975 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 11:53:18,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:18,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-02 11:53:18,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:53:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:53:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:53:18,996 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-02 11:53:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:19,131 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:53:19,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:53:19,131 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-02 11:53:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:19,132 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:53:19,132 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:53:19,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:53:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:53:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:53:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:53:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 11:53:19,138 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-02 11:53:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:19,138 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 11:53:19,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:53:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 11:53:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:53:19,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:19,139 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-02 11:53:19,139 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:19,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-02 11:53:19,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:19,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:19,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:19,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:19,771 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 11:53:19,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:19,771 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 11:53:19,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:19,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:53:19,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:19,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:20,562 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 11:53:20,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:20,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-02 11:53:20,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:53:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:53:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:53:20,584 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-02 11:53:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:20,804 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:53:20,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:53:20,805 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-02 11:53:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:20,806 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:53:20,806 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 11:53:20,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:53:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 11:53:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 11:53:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:53:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 11:53:20,809 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-02 11:53:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:20,810 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 11:53:20,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:53:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 11:53:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:53:20,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:20,810 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-02 11:53:20,810 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:20,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-02 11:53:20,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:20,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:20,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:20,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:20,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:21,657 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 11:53:21,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:21,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:21,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:21,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:21,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:21,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:22,409 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 11:53:22,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:22,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 11:53:22,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:53:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:53:22,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:53:22,432 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-02 11:53:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:22,685 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:53:22,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:53:22,686 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-02 11:53:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:22,686 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:53:22,686 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:53:22,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:53:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:53:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 11:53:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:53:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 11:53:22,690 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-02 11:53:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:22,690 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 11:53:22,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:53:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 11:53:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:53:22,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:22,691 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-02 11:53:22,691 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:22,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:22,692 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-02 11:53:22,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:22,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:22,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:22,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:22,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:23,373 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 11:53:23,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:23,374 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 11:53:23,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:23,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:53:23,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:23,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:24,294 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 11:53:24,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:24,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-02 11:53:24,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:53:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:53:24,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:53:24,315 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-02 11:53:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:24,646 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:53:24,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:53:24,647 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-02 11:53:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:24,648 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:53:24,648 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:53:24,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:53:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:53:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:53:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:53:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 11:53:24,653 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-02 11:53:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:24,653 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 11:53:24,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:53:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 11:53:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 11:53:24,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:24,653 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-02 11:53:24,654 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:24,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-02 11:53:24,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:24,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:24,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:24,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:24,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:25,468 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 11:53:25,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:25,468 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 11:53:25,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:25,511 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:53:25,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:25,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:26,403 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 11:53:26,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:26,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-02 11:53:26,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:53:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:53:26,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:53:26,424 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-02 11:53:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:26,602 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:53:26,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:53:26,603 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-02 11:53:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:26,604 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:53:26,604 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 11:53:26,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:53:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 11:53:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 11:53:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 11:53:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 11:53:26,608 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-02 11:53:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:26,608 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 11:53:26,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:53:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 11:53:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 11:53:26,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:26,609 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-02 11:53:26,609 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:26,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:26,609 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-02 11:53:26,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:26,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:26,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:26,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:26,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:27,416 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 11:53:27,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:27,417 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 11:53:27,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:27,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:28,541 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 11:53:28,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:28,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 11:53:28,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:53:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:53:28,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:53:28,563 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-02 11:53:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:28,783 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:53:28,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:53:28,783 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-02 11:53:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:28,784 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:53:28,784 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:53:28,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:53:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:53:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 11:53:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:53:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 11:53:28,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-02 11:53:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:28,788 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 11:53:28,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:53:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 11:53:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 11:53:28,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:28,789 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-02 11:53:28,789 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:28,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-02 11:53:28,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:28,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:28,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:28,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:28,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:29,556 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 11:53:29,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:29,556 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 11:53:29,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:29,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:29,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:29,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:30,487 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 11:53:30,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:30,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-02 11:53:30,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:53:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:53:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:53:30,509 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-02 11:53:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:30,673 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:53:30,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:53:30,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-02 11:53:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:30,674 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:53:30,674 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 11:53:30,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:53:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 11:53:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 11:53:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:53:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 11:53:30,679 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-02 11:53:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:30,679 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 11:53:30,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:53:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 11:53:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 11:53:30,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:30,680 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-02 11:53:30,680 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:30,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:30,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-02 11:53:30,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:30,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:30,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:30,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:30,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:31,734 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 11:53:31,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:31,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:31,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:31,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:53:31,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:31,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:32,830 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 11:53:32,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:32,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-02 11:53:32,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:53:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:53:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:53:32,851 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-02 11:53:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:33,075 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:53:33,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:53:33,075 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-02 11:53:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:33,076 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:53:33,076 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 11:53:33,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:53:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 11:53:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 11:53:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:53:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 11:53:33,079 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-02 11:53:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:33,079 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 11:53:33,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:53:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 11:53:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:53:33,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:33,080 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-02 11:53:33,080 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:33,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-02 11:53:33,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:33,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:33,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:33,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:33,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:33,989 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 11:53:33,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:33,989 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 11:53:33,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:34,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:34,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:34,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:35,070 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 11:53:35,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:35,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 11:53:35,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:53:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:53:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:53:35,091 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-02 11:53:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:35,263 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:53:35,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:53:35,263 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-02 11:53:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:35,265 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:53:35,265 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:53:35,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:53:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:53:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 11:53:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:53:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 11:53:35,269 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-02 11:53:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:35,270 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 11:53:35,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:53:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 11:53:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 11:53:35,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:35,271 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-02 11:53:35,271 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:35,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-02 11:53:35,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:35,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:35,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:36,161 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 11:53:36,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:36,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:36,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:36,210 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:53:36,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:36,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:37,361 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 11:53:37,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:37,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-02 11:53:37,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:53:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:53:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:53:37,382 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-02 11:53:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:37,578 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:53:37,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:53:37,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-02 11:53:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:37,580 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:53:37,580 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:53:37,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:53:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:53:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 11:53:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:53:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 11:53:37,586 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-02 11:53:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:37,586 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 11:53:37,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:53:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 11:53:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 11:53:37,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:37,587 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-02 11:53:37,587 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:37,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:37,587 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-02 11:53:37,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:37,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:37,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:37,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:37,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:38,733 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 11:53:38,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:38,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:38,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:38,782 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:53:38,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:38,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:40,025 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 11:53:40,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:40,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-02 11:53:40,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:53:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:53:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:53:40,047 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-02 11:53:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:40,272 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:53:40,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:53:40,272 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-02 11:53:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:40,273 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:53:40,273 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 11:53:40,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:53:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 11:53:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 11:53:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 11:53:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 11:53:40,278 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-02 11:53:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:40,279 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 11:53:40,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:53:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 11:53:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:53:40,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:40,279 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-02 11:53:40,280 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:40,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:40,280 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-02 11:53:40,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:40,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:40,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:40,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:40,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:42,188 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 11:53:42,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:42,188 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 11:53:42,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:42,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:43,558 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 11:53:43,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:43,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 11:53:43,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:53:43,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:53:43,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:53:43,580 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-02 11:53:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:43,761 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:53:43,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:53:43,762 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-02 11:53:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:43,763 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:53:43,763 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:53:43,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:53:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:53:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 11:53:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:53:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 11:53:43,767 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-02 11:53:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:43,767 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 11:53:43,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:53:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 11:53:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 11:53:43,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:43,768 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-02 11:53:43,768 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:43,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-02 11:53:43,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:43,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:43,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:43,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:43,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:45,189 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 11:53:45,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:45,190 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 11:53:45,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:45,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:45,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:45,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:46,433 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 11:53:46,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:46,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-02 11:53:46,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:53:46,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:53:46,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:53:46,455 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-02 11:53:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:46,647 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:53:46,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:53:46,648 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-02 11:53:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:46,649 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:53:46,649 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:53:46,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:53:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:53:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 11:53:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:53:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 11:53:46,654 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-02 11:53:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:46,654 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 11:53:46,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:53:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 11:53:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:53:46,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:46,655 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-02 11:53:46,655 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:46,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-02 11:53:46,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:46,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:46,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:46,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:47,854 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 11:53:47,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:47,854 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 11:53:47,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:47,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:53:47,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:47,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,405 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 11:53:49,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-02 11:53:49,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:53:49,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:53:49,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:53:49,427 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-02 11:53:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,677 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:53:49,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:53:49,677 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-02 11:53:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,679 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:53:49,679 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 11:53:49,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:53:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 11:53:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 11:53:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 11:53:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 11:53:49,684 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-02 11:53:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,684 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 11:53:49,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:53:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 11:53:49,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 11:53:49,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,685 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-02 11:53:49,685 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-02 11:53:49,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:49,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:50,980 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 11:53:50,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:50,980 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 11:53:50,988 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:51,013 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:51,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:51,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:52,310 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 11:53:52,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:52,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-02 11:53:52,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:53:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:53:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:53:52,332 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-02 11:53:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:52,556 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:53:52,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:53:52,556 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-02 11:53:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:52,557 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:53:52,558 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:53:52,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:53:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:53:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 11:53:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 11:53:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 11:53:52,563 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-02 11:53:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:52,563 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 11:53:52,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:53:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 11:53:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 11:53:52,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:52,564 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-02 11:53:52,565 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:52,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-02 11:53:52,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:52,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:52,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:52,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,001 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 11:53:54,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,001 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 11:53:54,009 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:54,060 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:53:54,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:54,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,536 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 11:53:55,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-02 11:53:55,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:53:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:53:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:53:55,558 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-02 11:53:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,765 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:53:55,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:53:55,766 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-02 11:53:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:55,767 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:53:55,767 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 11:53:55,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:53:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 11:53:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 11:53:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:53:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 11:53:55,772 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-02 11:53:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:55,772 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 11:53:55,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:53:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 11:53:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 11:53:55,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:55,773 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-02 11:53:55,773 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:55,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-02 11:53:55,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:55,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:55,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:55,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,011 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 11:53:57,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,012 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 11:53:57,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:57,066 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:53:57,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:57,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:58,784 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 11:53:58,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-02 11:53:58,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:53:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:53:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:53:58,806 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-02 11:53:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:59,055 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:53:59,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:53:59,055 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-02 11:53:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:59,056 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:53:59,056 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 11:53:59,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:53:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 11:53:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 11:53:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 11:53:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 11:53:59,062 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-02 11:53:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:59,063 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 11:53:59,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:53:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 11:53:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:53:59,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:59,064 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-02 11:53:59,064 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:59,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-02 11:53:59,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:59,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:59,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:59,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,288 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 11:54:00,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:00,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:02,691 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 11:54:02,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:02,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-02 11:54:02,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:54:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:54:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:54:02,713 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-02 11:54:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,994 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:54:02,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:54:02,995 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-02 11:54:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,996 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:54:02,997 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:54:02,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:54:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:54:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 11:54:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:54:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 11:54:03,002 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-02 11:54:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:03,002 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 11:54:03,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:54:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 11:54:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 11:54:03,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:03,003 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-02 11:54:03,003 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:03,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:03,004 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-02 11:54:03,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:03,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:03,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:03,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:04,728 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 11:54:04,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:04,729 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 11:54:04,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:04,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:04,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:04,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:06,257 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 11:54:06,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:06,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-02 11:54:06,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:54:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:54:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:54:06,280 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-02 11:54:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:07,936 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:54:07,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:54:07,936 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-02 11:54:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:07,937 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:54:07,937 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 11:54:07,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:54:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 11:54:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 11:54:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:54:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 11:54:07,945 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-02 11:54:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:07,945 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 11:54:07,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:54:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 11:54:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 11:54:07,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:07,946 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-02 11:54:07,946 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:07,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-02 11:54:07,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:07,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:07,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:07,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,694 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 11:54:09,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:09,694 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 11:54:09,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:09,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:54:09,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:09,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,374 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 11:54:11,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-02 11:54:11,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:54:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:54:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:54:11,396 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-02 11:54:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:11,614 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:54:11,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:54:11,615 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-02 11:54:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:11,616 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:54:11,616 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 11:54:11,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:54:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 11:54:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 11:54:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 11:54:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 11:54:11,622 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-02 11:54:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:11,622 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 11:54:11,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:54:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 11:54:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:54:11,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:11,623 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-02 11:54:11,623 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:11,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:11,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-02 11:54:11,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:11,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:11,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:11,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:13,018 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 11:54:13,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:13,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:13,035 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:13,080 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:13,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:13,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:15,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-02 11:54:15,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:54:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:54:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:54:15,304 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-02 11:54:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:15,527 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:54:15,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:54:15,528 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-02 11:54:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:15,529 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:54:15,529 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:54:15,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:54:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:54:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 11:54:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 11:54:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-02 11:54:15,535 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-02 11:54:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:15,535 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-02 11:54:15,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:54:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-02 11:54:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 11:54:15,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:15,536 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-02 11:54:15,536 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:15,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-02 11:54:15,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:15,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:15,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:15,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:16,853 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 11:54:16,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:16,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:16,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:16,988 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:54:16,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:16,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:18,910 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 11:54:18,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:18,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-02 11:54:18,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:54:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:54:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:54:18,933 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-02 11:54:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:19,203 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:54:19,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:54:19,203 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-02 11:54:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:19,204 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:54:19,205 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 11:54:19,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:54:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 11:54:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 11:54:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:54:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-02 11:54:19,209 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-02 11:54:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:19,210 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-02 11:54:19,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:54:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-02 11:54:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 11:54:19,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:19,210 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-02 11:54:19,210 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:19,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-02 11:54:19,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:19,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:19,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:19,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:21,024 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 11:54:21,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:21,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:21,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:21,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:54:21,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:21,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:22,928 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 11:54:22,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:22,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-02 11:54:22,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 11:54:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 11:54:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:54:22,950 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-02 11:54:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:23,210 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:54:23,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:54:23,210 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-02 11:54:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:23,212 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:54:23,212 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 11:54:23,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:54:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 11:54:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 11:54:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 11:54:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-02 11:54:23,220 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-02 11:54:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:23,220 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-02 11:54:23,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 11:54:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-02 11:54:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 11:54:23,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:23,221 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-02 11:54:23,222 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:23,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-02 11:54:23,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:23,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:23,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:23,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,259 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 11:54:25,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:25,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:25,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:27,054 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 11:54:27,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:27,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-02 11:54:27,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 11:54:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 11:54:27,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:54:27,076 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-02 11:54:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:27,600 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:54:27,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:54:27,600 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-02 11:54:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:27,602 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:54:27,602 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 11:54:27,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:54:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 11:54:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-02 11:54:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 11:54:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-02 11:54:27,609 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-02 11:54:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:27,609 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-02 11:54:27,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 11:54:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-02 11:54:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-02 11:54:27,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:27,610 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-02 11:54:27,610 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:27,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-02 11:54:27,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:27,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:27,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:27,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:27,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:30,894 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 11:54:30,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:30,894 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 11:54:30,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:30,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:30,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:30,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:32,814 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 11:54:32,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:32,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-02 11:54:32,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-02 11:54:32,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-02 11:54:32,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:54:32,836 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-02 11:54:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:33,140 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 11:54:33,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:54:33,140 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-02 11:54:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:33,141 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:54:33,141 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 11:54:33,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:54:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 11:54:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-02 11:54:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 11:54:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-02 11:54:33,147 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-02 11:54:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:33,148 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-02 11:54:33,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-02 11:54:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-02 11:54:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-02 11:54:33,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:33,149 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-02 11:54:33,149 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:33,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-02 11:54:33,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:33,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:33,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:33,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:35,530 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 11:54:35,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:35,530 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 11:54:35,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:35,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:54:35,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:35,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:37,497 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 11:54:37,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:37,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-02 11:54:37,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 11:54:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 11:54:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:54:37,519 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-02 11:54:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:37,782 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 11:54:37,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:54:37,783 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-02 11:54:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:37,784 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:54:37,784 INFO L226 Difference]: Without dead ends: 120 [2018-10-02 11:54:37,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:54:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-02 11:54:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-02 11:54:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-02 11:54:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-02 11:54:37,789 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-02 11:54:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:37,789 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-02 11:54:37,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 11:54:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-02 11:54:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-02 11:54:37,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:37,790 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-02 11:54:37,790 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:37,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-02 11:54:37,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:37,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:37,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:37,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:39,561 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 11:54:39,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:39,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:39,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:39,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:39,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:39,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,966 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 11:54:41,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-02 11:54:41,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-02 11:54:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-02 11:54:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:54:41,991 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-02 11:54:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,327 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 11:54:42,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:54:42,327 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-02 11:54:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,328 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:54:42,328 INFO L226 Difference]: Without dead ends: 122 [2018-10-02 11:54:42,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:54:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-02 11:54:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-02 11:54:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 11:54:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-02 11:54:42,333 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-02 11:54:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,334 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-02 11:54:42,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-02 11:54:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-02 11:54:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-02 11:54:42,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,335 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-02 11:54:42,335 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-02 11:54:42,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:42,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,965 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 11:54:44,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:44,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:45,039 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:54:45,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:45,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:47,256 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 11:54:47,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:47,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-02 11:54:47,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-02 11:54:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-02 11:54:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:54:47,279 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-02 11:54:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:47,546 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 11:54:47,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:54:47,547 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-02 11:54:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:47,548 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:54:47,549 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 11:54:47,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:54:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 11:54:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-02 11:54:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 11:54:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-02 11:54:47,554 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-02 11:54:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,555 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-02 11:54:47,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-02 11:54:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-02 11:54:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-02 11:54:47,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,556 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-02 11:54:47,556 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-02 11:54:47,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:49,230 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 11:54:49,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:49,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:49,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:49,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:54:49,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:49,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,644 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 11:54:51,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-02 11:54:51,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-02 11:54:51,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-02 11:54:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-02 11:54:51,667 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-02 11:54:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,919 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 11:54:51,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:54:51,920 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-02 11:54:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,921 INFO L225 Difference]: With dead ends: 127 [2018-10-02 11:54:51,921 INFO L226 Difference]: Without dead ends: 126 [2018-10-02 11:54:51,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-02 11:54:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-02 11:54:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-02 11:54:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-02 11:54:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-02 11:54:51,925 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-02 11:54:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,925 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-02 11:54:51,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-02 11:54:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-02 11:54:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-02 11:54:51,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,926 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-02 11:54:51,926 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,926 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-02 11:54:51,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:53,625 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 11:54:53,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:53,625 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 11:54:53,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:53,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:56,116 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 11:54:56,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:56,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-02 11:54:56,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-02 11:54:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-02 11:54:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:54:56,139 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-02 11:54:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:56,451 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 11:54:56,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:54:56,452 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-02 11:54:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:56,453 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:54:56,453 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 11:54:56,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:54:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 11:54:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-02 11:54:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-02 11:54:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-02 11:54:56,457 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-02 11:54:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:56,457 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-02 11:54:56,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-02 11:54:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-02 11:54:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-02 11:54:56,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:56,458 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-02 11:54:56,458 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:56,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:56,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-02 11:54:56,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:56,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:56,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:56,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:58,250 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 11:54:58,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:58,251 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 11:54:58,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:58,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:58,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:58,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:00,793 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 11:55:00,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:00,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-02 11:55:00,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-02 11:55:00,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-02 11:55:00,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-02 11:55:00,816 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-02 11:55:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,074 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 11:55:01,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:55:01,075 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-02 11:55:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,075 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:55:01,076 INFO L226 Difference]: Without dead ends: 130 [2018-10-02 11:55:01,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-02 11:55:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-02 11:55:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-02 11:55:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-02 11:55:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-02 11:55:01,080 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-02 11:55:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,081 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-02 11:55:01,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-02 11:55:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-02 11:55:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-02 11:55:01,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,082 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-02 11:55:01,082 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-02 11:55:01,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:01,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:02,930 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 11:55:02,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:02,931 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 11:55:02,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:03,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:55:03,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:05,562 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 11:55:05,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:05,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-02 11:55:05,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-02 11:55:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-02 11:55:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:55:05,586 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-02 11:55:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:05,891 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 11:55:05,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:55:05,891 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-02 11:55:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:05,892 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:55:05,892 INFO L226 Difference]: Without dead ends: 132 [2018-10-02 11:55:05,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:55:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-02 11:55:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-02 11:55:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-02 11:55:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-02 11:55:05,898 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-02 11:55:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:05,898 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-02 11:55:05,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-02 11:55:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-02 11:55:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-02 11:55:05,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:05,899 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-02 11:55:05,900 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:05,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-02 11:55:05,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:05,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:05,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:05,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:07,742 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 11:55:07,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:07,742 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 11:55:07,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:07,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:07,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:07,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:10,375 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 11:55:10,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:10,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-02 11:55:10,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-02 11:55:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-02 11:55:10,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:55:10,399 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-02 11:55:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:10,679 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 11:55:10,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:55:10,680 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-02 11:55:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:10,681 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:55:10,681 INFO L226 Difference]: Without dead ends: 134 [2018-10-02 11:55:10,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:55:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-02 11:55:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-02 11:55:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-02 11:55:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-02 11:55:10,688 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-02 11:55:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:10,688 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-02 11:55:10,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-02 11:55:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-02 11:55:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-02 11:55:10,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:10,689 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-02 11:55:10,689 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:10,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-02 11:55:10,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:10,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:12,856 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 11:55:12,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:12,857 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 11:55:12,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:12,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:55:12,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:12,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:16,355 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 11:55:16,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:16,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-02 11:55:16,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-02 11:55:16,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-02 11:55:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:55:16,378 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-02 11:55:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:16,723 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 11:55:16,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:55:16,724 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-02 11:55:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:16,725 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:55:16,725 INFO L226 Difference]: Without dead ends: 136 [2018-10-02 11:55:16,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:55:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-02 11:55:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-02 11:55:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 11:55:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-02 11:55:16,732 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-02 11:55:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:16,733 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-02 11:55:16,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-02 11:55:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-02 11:55:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 11:55:16,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:16,734 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-02 11:55:16,734 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:16,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:16,734 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-02 11:55:16,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:16,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:16,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:16,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:18,684 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 11:55:18,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:18,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:18,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:18,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:55:18,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:18,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:21,462 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 11:55:21,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:21,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-02 11:55:21,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-02 11:55:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-02 11:55:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-02 11:55:21,485 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-02 11:55:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:21,803 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 11:55:21,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:55:21,803 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-02 11:55:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:21,804 INFO L225 Difference]: With dead ends: 139 [2018-10-02 11:55:21,804 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 11:55:21,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-02 11:55:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 11:55:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-02 11:55:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-02 11:55:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-02 11:55:21,808 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-02 11:55:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:21,808 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-02 11:55:21,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-02 11:55:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-02 11:55:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-02 11:55:21,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:21,809 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-02 11:55:21,809 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:21,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:21,809 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-02 11:55:21,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:21,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:21,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:21,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:23,885 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 11:55:23,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:23,885 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 11:55:23,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:23,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:26,738 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 11:55:26,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:26,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-02 11:55:26,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-02 11:55:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-02 11:55:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:55:26,760 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-02 11:55:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:27,069 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 11:55:27,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:55:27,069 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-02 11:55:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:27,070 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:55:27,070 INFO L226 Difference]: Without dead ends: 140 [2018-10-02 11:55:27,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:55:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-02 11:55:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-02 11:55:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-02 11:55:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-02 11:55:27,075 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-02 11:55:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:27,075 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-02 11:55:27,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-02 11:55:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-02 11:55:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-02 11:55:27,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:27,076 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-02 11:55:27,076 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:27,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-02 11:55:27,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:27,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:27,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:27,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:29,110 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 11:55:29,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:29,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:29,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:29,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:29,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:29,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:31,989 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 11:55:32,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:32,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-02 11:55:32,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-02 11:55:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-02 11:55:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:55:32,011 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-02 11:55:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:32,338 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 11:55:32,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:55:32,338 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-02 11:55:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:32,339 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:55:32,339 INFO L226 Difference]: Without dead ends: 142 [2018-10-02 11:55:32,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:55:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-02 11:55:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-02 11:55:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-02 11:55:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-02 11:55:32,344 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-02 11:55:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:32,344 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-02 11:55:32,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-02 11:55:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-02 11:55:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-02 11:55:32,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:32,345 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-02 11:55:32,345 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:32,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-02 11:55:32,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:32,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:32,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:32,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:34,419 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 11:55:34,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:34,419 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 11:55:34,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:34,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:55:34,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:34,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:37,438 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 11:55:37,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:37,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-02 11:55:37,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-02 11:55:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-02 11:55:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:55:37,461 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-02 11:55:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:37,820 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 11:55:37,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:55:37,821 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-02 11:55:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:37,822 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:55:37,822 INFO L226 Difference]: Without dead ends: 144 [2018-10-02 11:55:37,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:55:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-02 11:55:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-02 11:55:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-02 11:55:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-02 11:55:37,827 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-02 11:55:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:37,827 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-02 11:55:37,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-02 11:55:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-02 11:55:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-02 11:55:37,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:37,828 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-02 11:55:37,828 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:37,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-02 11:55:37,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:37,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:37,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:37,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:40,014 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 11:55:40,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:40,015 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 11:55:40,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:40,066 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:40,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:40,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:43,223 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 11:55:43,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:43,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-02 11:55:43,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-02 11:55:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-02 11:55:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-02 11:55:43,246 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-02 11:55:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:43,664 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 11:55:43,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:55:43,665 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-02 11:55:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:43,666 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:55:43,666 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 11:55:43,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-02 11:55:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 11:55:43,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-02 11:55:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-02 11:55:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-02 11:55:43,671 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-02 11:55:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:43,671 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-02 11:55:43,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-02 11:55:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-02 11:55:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-02 11:55:43,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:43,672 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-02 11:55:43,672 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:43,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-02 11:55:43,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:43,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:43,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:43,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:43,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:46,047 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 11:55:46,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:46,048 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 11:55:46,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:46,298 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:55:46,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:46,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:49,416 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 11:55:49,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:49,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-02 11:55:49,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-02 11:55:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-02 11:55:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:55:49,441 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-02 11:55:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:49,803 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 11:55:49,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:55:49,803 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-02 11:55:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:49,805 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:55:49,805 INFO L226 Difference]: Without dead ends: 148 [2018-10-02 11:55:49,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:55:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-02 11:55:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-02 11:55:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-02 11:55:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-02 11:55:49,811 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-02 11:55:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:49,811 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-02 11:55:49,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-02 11:55:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-02 11:55:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-02 11:55:49,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:49,812 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-02 11:55:49,812 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:49,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-02 11:55:49,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:49,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:49,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:49,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:52,444 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 11:55:52,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:52,445 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 11:55:52,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:52,544 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 11:55:52,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:52,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:55,537 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 11:55:55,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:55,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-02 11:55:55,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-02 11:55:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-02 11:55:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-02 11:55:55,561 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-02 11:55:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:56,278 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 11:55:56,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:55:56,279 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-02 11:55:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:56,280 INFO L225 Difference]: With dead ends: 151 [2018-10-02 11:55:56,281 INFO L226 Difference]: Without dead ends: 150 [2018-10-02 11:55:56,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-02 11:55:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-02 11:55:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-02 11:55:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-02 11:55:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-02 11:55:56,287 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-02 11:55:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:56,287 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-02 11:55:56,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-02 11:55:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-02 11:55:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-02 11:55:56,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:56,288 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-02 11:55:56,288 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:56,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-02 11:55:56,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:56,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:56,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:56,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:56,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:58,622 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 11:55:58,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:58,622 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 11:55:58,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:58,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:02,005 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 11:56:02,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:02,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-02 11:56:02,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-02 11:56:02,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-02 11:56:02,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-02 11:56:02,029 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-02 11:56:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:02,397 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 11:56:02,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:56:02,397 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-02 11:56:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:02,398 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:56:02,399 INFO L226 Difference]: Without dead ends: 152 [2018-10-02 11:56:02,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-02 11:56:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-02 11:56:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-02 11:56:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-02 11:56:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-02 11:56:02,405 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-02 11:56:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:02,405 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-02 11:56:02,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-02 11:56:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-02 11:56:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-02 11:56:02,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:02,407 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-02 11:56:02,407 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:02,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-02 11:56:02,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:02,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:02,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:02,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:04,842 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 11:56:04,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:04,842 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 11:56:04,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:04,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:04,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:04,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:08,203 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 11:56:08,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:08,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-02 11:56:08,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-02 11:56:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-02 11:56:08,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-02 11:56:08,225 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-02 11:56:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:08,623 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 11:56:08,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:56:08,624 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-02 11:56:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:08,625 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:56:08,625 INFO L226 Difference]: Without dead ends: 154 [2018-10-02 11:56:08,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-02 11:56:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-02 11:56:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-02 11:56:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-02 11:56:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-02 11:56:08,630 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-02 11:56:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:08,630 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-02 11:56:08,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-02 11:56:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-02 11:56:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-02 11:56:08,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:08,631 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-02 11:56:08,631 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:08,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:08,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-02 11:56:08,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:08,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:08,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:08,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:08,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:11,100 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 11:56:11,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:11,100 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 11:56:11,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:11,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 11:56:11,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:11,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:14,555 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 11:56:14,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:14,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-02 11:56:14,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-02 11:56:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-02 11:56:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-02 11:56:14,580 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-02 11:56:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:14,996 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 11:56:14,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:56:14,996 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-02 11:56:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:14,997 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:56:14,998 INFO L226 Difference]: Without dead ends: 156 [2018-10-02 11:56:14,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-02 11:56:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-02 11:56:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-02 11:56:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-02 11:56:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-02 11:56:15,003 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-02 11:56:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:15,003 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-02 11:56:15,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-02 11:56:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-02 11:56:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-02 11:56:15,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:15,004 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-02 11:56:15,004 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:15,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-02 11:56:15,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:15,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:15,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:15,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:15,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:17,765 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 11:56:17,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:17,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:17,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:17,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:17,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:17,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:21,020 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 11:56:21,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:21,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-02 11:56:21,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-02 11:56:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-02 11:56:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-02 11:56:21,042 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-02 11:56:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:21,387 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 11:56:21,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:56:21,388 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-02 11:56:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:21,389 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:56:21,389 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 11:56:21,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-02 11:56:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 11:56:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-02 11:56:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-02 11:56:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-02 11:56:21,394 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-02 11:56:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:21,394 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-02 11:56:21,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-02 11:56:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-02 11:56:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-02 11:56:21,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:21,395 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-02 11:56:21,395 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:21,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:21,395 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-02 11:56:21,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:21,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:21,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:21,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:21,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:24,218 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 11:56:24,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:24,218 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 11:56:24,225 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:24,331 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 11:56:24,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:24,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:27,774 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 11:56:27,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:27,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-02 11:56:27,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-02 11:56:27,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-02 11:56:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-02 11:56:27,798 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-02 11:56:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:28,187 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 11:56:28,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:56:28,187 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-02 11:56:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:28,188 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:56:28,189 INFO L226 Difference]: Without dead ends: 160 [2018-10-02 11:56:28,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-02 11:56:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-02 11:56:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-02 11:56:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-02 11:56:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-02 11:56:28,195 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-02 11:56:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:28,195 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-02 11:56:28,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-02 11:56:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-02 11:56:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-02 11:56:28,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:28,196 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-02 11:56:28,197 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:28,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-02 11:56:28,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:28,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:28,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:28,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:28,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:30,831 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 11:56:30,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:30,831 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 11:56:30,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:30,970 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 11:56:30,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:30,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:34,597 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 11:56:34,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:34,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-02 11:56:34,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-02 11:56:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-02 11:56:34,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-02 11:56:34,621 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-02 11:56:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:35,031 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-02 11:56:35,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:56:35,031 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-02 11:56:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:35,032 INFO L225 Difference]: With dead ends: 163 [2018-10-02 11:56:35,032 INFO L226 Difference]: Without dead ends: 162 [2018-10-02 11:56:35,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-02 11:56:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-02 11:56:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-02 11:56:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-02 11:56:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-02 11:56:35,037 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-02 11:56:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:35,037 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-02 11:56:35,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-02 11:56:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-02 11:56:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-02 11:56:35,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:35,038 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-02 11:56:35,039 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:35,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:35,039 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-02 11:56:35,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:35,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:35,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:35,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:35,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:38,151 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 11:56:38,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:38,151 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 11:56:38,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:38,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:41,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:41,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-02 11:56:41,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-02 11:56:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-02 11:56:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-02 11:56:41,642 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. Received shutdown request... [2018-10-02 11:56:42,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:56:42,011 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:56:42,017 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:56:42,017 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:56:42 BoogieIcfgContainer [2018-10-02 11:56:42,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:56:42,018 INFO L168 Benchmark]: Toolchain (without parser) took 236838.94 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.5 MB). Free memory was 1.5 GB in the beginning and 979.3 MB in the end (delta: 471.2 MB). Peak memory consumption was 492.7 MB. Max. memory is 7.1 GB. [2018-10-02 11:56:42,020 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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 11:56:42,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.30 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 11:56:42,021 INFO L168 Benchmark]: Boogie Preprocessor took 27.19 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 11:56:42,021 INFO L168 Benchmark]: RCFGBuilder took 290.36 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 11:56:42,022 INFO L168 Benchmark]: TraceAbstraction took 236470.36 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.5 MB). Free memory was 1.4 GB in the beginning and 979.3 MB in the end (delta: 450.0 MB). Peak memory consumption was 471.5 MB. Max. memory is 7.1 GB. [2018-10-02 11:56:42,027 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.30 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 27.19 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 290.36 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 236470.36 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.5 MB). Free memory was 1.4 GB in the beginning and 979.3 MB in the end (delta: 450.0 MB). Peak memory consumption was 471.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was constructing difference of abstraction (162states) and FLOYD_HOARE automaton (currently 82 states, 162 states before enhancement), while ReachableStatesComputation was computing reachable states (159 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.4s OverallTime, 80 OverallIterations, 80 TraceHistogramMax, 19.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 161 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13170 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 203.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=79, 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, 79 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 208.3s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-56-42-047.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-56-42-047.csv Completed graceful shutdown