java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:40:22,175 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:40:22,177 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:40:22,189 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:40:22,189 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:40:22,190 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:40:22,192 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:40:22,193 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:40:22,195 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:40:22,196 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:40:22,197 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:40:22,220 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:40:22,239 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:40:22,240 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:40:22,241 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:40:22,241 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:40:22,242 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:40:22,242 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:40:22,242 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:40:22,245 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:40:22,245 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:40:22,245 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:40:22,246 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:40:22,246 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:40:22,246 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:40:22,246 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:40:22,247 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:40:22,247 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:40:22,247 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:40:22,247 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:40:22,249 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:40:22,249 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:40:22,249 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:40:22,249 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:40:22,250 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:40:22,250 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:40:22,250 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:40:22,250 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:40:22,251 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:40:22,251 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:40:22,251 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:40:22,251 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:40:22,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:40:22,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:40:22,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:40:22,343 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:40:22,343 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:40:22,344 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl [2018-10-02 11:40:22,344 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl' [2018-10-02 11:40:22,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:40:22,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:40:22,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:40:22,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:40:22,405 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:40:22,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:40:22,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:40:22,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:40:22,450 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:40:22,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... [2018-10-02 11:40:22,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:40:22,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:40:22,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:40:22,473 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:40:22,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:40:22,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:40:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:40:22,791 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:40:22,792 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:40:22 BoogieIcfgContainer [2018-10-02 11:40:22,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:40:22,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:40:22,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:40:22,801 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:40:22,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:40:22" (1/2) ... [2018-10-02 11:40:22,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36455b75 and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:40:22, skipping insertion in model container [2018-10-02 11:40:22,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:40:22" (2/2) ... [2018-10-02 11:40:22,805 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl [2018-10-02 11:40:22,817 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:40:22,827 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:40:22,886 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:40:22,887 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:40:22,887 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:40:22,887 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:40:22,887 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:40:22,887 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:40:22,888 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:40:22,888 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:40:22,888 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:40:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-02 11:40:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:40:22,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,916 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:40:22,918 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-02 11:40:22,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:22,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:23,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:40:23,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:40:23,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:40:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:40:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:40:23,104 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-02 11:40:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,193 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-02 11:40:23,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:40:23,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-02 11:40:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,210 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:40:23,210 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:40:23,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:40:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:40:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:40:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:40:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 11:40:23,293 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-10-02 11:40:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,293 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 11:40:23,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:40:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 11:40:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:40:23,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,297 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:40:23,298 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-02 11:40:23,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:23,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-02 11:40:23,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-02 11:40:23,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:40:23,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:40:23,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:40:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:40:23,502 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-02 11:40:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:23,700 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-02 11:40:23,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:40:23,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-02 11:40:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:23,703 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:40:23,703 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:40:23,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:40:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:40:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:40:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:40:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-02 11:40:23,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-02 11:40:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:23,714 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-02 11:40:23,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:40:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-02 11:40:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:40:23,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:23,715 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-02 11:40:23,715 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:23,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times [2018-10-02 11:40:23,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:23,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:23,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:23,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-02 11:40:23,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:23,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:23,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:23,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:23,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:23,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-02 11:40:23,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:23,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:40:23,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:40:23,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:40:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:40:23,963 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-02 11:40:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,054 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-02 11:40:24,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:40:24,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-02 11:40:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,056 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:40:24,056 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:40:24,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:40:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:40:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:40:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:40:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-02 11:40:24,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-02 11:40:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,066 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-02 11:40:24,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:40:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-02 11:40:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:40:24,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,067 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-02 11:40:24,068 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times [2018-10-02 11:40:24,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-02 11:40:24,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:24,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:40:24,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:24,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-02 11:40:24,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:40:24,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:40:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:40:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:40:24,459 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-10-02 11:40:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,582 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-02 11:40:24,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:40:24,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-02 11:40:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,584 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:40:24,584 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:40:24,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:40:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:40:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:40:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:40:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-02 11:40:24,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-10-02 11:40:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,593 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-02 11:40:24,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:40:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-02 11:40:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:40:24,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,595 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-02 11:40:24,595 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times [2018-10-02 11:40:24,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-02 11:40:24,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,770 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:24,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:24,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:24,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-02 11:40:24,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:40:24,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:40:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:40:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:40:24,837 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-10-02 11:40:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,895 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-02 11:40:24,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:40:24,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-02 11:40:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,898 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:40:24,898 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:40:24,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:40:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:40:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:40:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:40:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-02 11:40:24,905 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-10-02 11:40:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,905 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-02 11:40:24,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:40:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-02 11:40:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:40:24,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,907 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-02 11:40:24,907 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times [2018-10-02 11:40:24,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-02 11:40:25,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:25,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:25,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:40:25,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-02 11:40:25,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:40:25,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:40:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:40:25,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:40:25,205 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-10-02 11:40:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,290 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-02 11:40:25,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:40:25,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-02 11:40:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,292 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:40:25,292 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:40:25,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:40:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:40:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:40:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:40:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-02 11:40:25,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-02 11:40:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,299 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-02 11:40:25,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:40:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-02 11:40:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:40:25,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,300 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-02 11:40:25,301 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times [2018-10-02 11:40:25,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-02 11:40:25,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:25,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:25,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:25,524 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:40:25,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-02 11:40:25,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:25,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:40:25,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:40:25,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:40:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:40:25,567 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-10-02 11:40:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,635 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-10-02 11:40:25,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:40:25,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-02 11:40:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,637 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:40:25,637 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:40:25,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:40:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:40:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:40:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:40:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-02 11:40:25,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-10-02 11:40:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,644 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-02 11:40:25,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:40:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-02 11:40:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:40:25,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,646 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-02 11:40:25,646 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times [2018-10-02 11:40:25,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:25,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-02 11:40:26,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-02 11:40:26,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:26,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:40:26,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:40:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:40:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:26,257 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-10-02 11:40:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:26,324 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2018-10-02 11:40:26,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:40:26,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-02 11:40:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:26,329 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:40:26,329 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:40:26,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:26,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:40:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:40:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:40:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-02 11:40:26,342 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2018-10-02 11:40:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:26,342 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-02 11:40:26,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:40:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-02 11:40:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:40:26,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:26,344 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-02 11:40:26,344 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:26,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times [2018-10-02 11:40:26,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:26,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:26,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:26,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-02 11:40:26,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:26,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:26,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:26,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-02 11:40:27,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:27,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:40:27,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:40:27,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:40:27,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:27,021 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-10-02 11:40:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:27,107 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-10-02 11:40:27,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:40:27,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-02 11:40:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:27,109 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:40:27,109 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:40:27,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:40:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:40:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:40:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-02 11:40:27,116 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-10-02 11:40:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:27,116 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-02 11:40:27,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:40:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-02 11:40:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:40:27,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:27,118 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-02 11:40:27,118 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:27,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times [2018-10-02 11:40:27,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:27,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:27,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:27,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-02 11:40:27,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:27,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:27,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:27,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:40:27,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:27,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-02 11:40:27,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:27,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:40:27,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:40:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:40:27,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:27,568 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-10-02 11:40:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:27,747 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-10-02 11:40:27,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:40:27,747 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-10-02 11:40:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:27,748 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:40:27,749 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:40:27,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:40:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:40:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:40:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-02 11:40:27,757 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2018-10-02 11:40:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:27,757 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-02 11:40:27,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:40:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-02 11:40:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:40:27,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:27,759 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-02 11:40:27,759 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:27,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times [2018-10-02 11:40:27,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:27,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:27,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:27,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-02 11:40:28,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:28,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:28,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:28,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:28,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:28,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-02 11:40:28,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:40:28,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:40:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:40:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:28,130 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2018-10-02 11:40:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,210 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-02 11:40:28,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:40:28,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-02 11:40:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,211 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:40:28,211 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:40:28,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:40:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:40:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:40:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-02 11:40:28,220 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-10-02 11:40:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,221 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-02 11:40:28,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:40:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-02 11:40:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:40:28,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,222 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-02 11:40:28,222 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times [2018-10-02 11:40:28,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-02 11:40:28,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:28,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:28,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:28,460 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:40:28,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:28,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-02 11:40:28,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:40:28,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:40:28,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:40:28,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:28,497 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-10-02 11:40:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,587 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-10-02 11:40:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:40:28,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-10-02 11:40:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,588 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:40:28,588 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:40:28,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:40:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:40:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:40:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-02 11:40:28,596 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-10-02 11:40:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,597 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-02 11:40:28,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:40:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-02 11:40:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:40:28,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,598 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-02 11:40:28,598 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times [2018-10-02 11:40:28,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-02 11:40:28,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:28,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:28,813 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:28,853 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:40:28,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:28,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-02 11:40:28,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:40:28,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:40:28,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:40:28,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:28,899 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2018-10-02 11:40:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,993 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2018-10-02 11:40:28,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:40:28,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-02 11:40:28,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,995 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:40:28,995 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:40:28,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:40:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:40:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:40:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-02 11:40:29,003 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-10-02 11:40:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:29,003 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-02 11:40:29,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:40:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-02 11:40:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:40:29,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:29,005 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-02 11:40:29,005 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:29,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times [2018-10-02 11:40:29,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:29,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:29,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:29,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-02 11:40:29,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:29,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:29,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-02 11:40:29,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:29,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:40:29,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:40:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:40:29,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:29,289 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2018-10-02 11:40:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:29,390 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2018-10-02 11:40:29,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:40:29,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-10-02 11:40:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:29,391 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:40:29,391 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:40:29,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:40:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:40:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:40:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-02 11:40:29,397 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-10-02 11:40:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:29,398 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-02 11:40:29,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:40:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-02 11:40:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:40:29,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:29,399 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-02 11:40:29,399 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:29,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times [2018-10-02 11:40:29,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:29,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:29,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:29,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-02 11:40:29,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:29,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:29,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:29,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:29,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:29,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-02 11:40:29,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:29,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:40:29,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:40:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:40:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:29,877 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states. [2018-10-02 11:40:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:29,960 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-10-02 11:40:29,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:40:29,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-10-02 11:40:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:29,962 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:40:29,962 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:40:29,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:40:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:40:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:40:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-02 11:40:29,970 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-10-02 11:40:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:29,970 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-02 11:40:29,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:40:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-02 11:40:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:40:29,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:29,971 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-02 11:40:29,972 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:29,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times [2018-10-02 11:40:29,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:29,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:29,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:29,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-02 11:40:30,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:30,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:30,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:30,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:40:30,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:30,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-02 11:40:30,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:30,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:40:30,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:40:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:40:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:30,838 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2018-10-02 11:40:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:31,404 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-02 11:40:31,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:40:31,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-10-02 11:40:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:31,405 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:40:31,405 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:40:31,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:40:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:40:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:40:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-02 11:40:31,416 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-10-02 11:40:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:31,416 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-02 11:40:31,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:40:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-02 11:40:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:40:31,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:31,417 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-02 11:40:31,418 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:31,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:31,418 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times [2018-10-02 11:40:31,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:31,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:31,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:31,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-02 11:40:31,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:31,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:31,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:31,945 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:31,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:31,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-02 11:40:31,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:31,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:40:31,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:40:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:40:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:31,998 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states. [2018-10-02 11:40:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:32,286 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2018-10-02 11:40:32,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:40:32,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-02 11:40:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:32,288 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:40:32,288 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:40:32,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:40:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:40:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:40:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-02 11:40:32,294 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2018-10-02 11:40:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:32,294 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-02 11:40:32,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:40:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-02 11:40:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:40:32,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:32,295 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-02 11:40:32,296 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:32,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:32,296 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times [2018-10-02 11:40:32,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:32,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:32,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:32,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-10-02 11:40:32,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:32,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:32,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:32,739 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:40:32,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:32,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-10-02 11:40:32,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:32,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:40:32,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:40:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:40:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:32,787 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-10-02 11:40:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:32,888 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2018-10-02 11:40:32,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:40:32,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-10-02 11:40:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:32,890 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:40:32,890 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:40:32,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:40:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:40:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:40:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-02 11:40:32,898 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-10-02 11:40:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:32,898 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-02 11:40:32,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:40:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-02 11:40:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:40:32,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:32,900 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-02 11:40:32,900 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:32,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times [2018-10-02 11:40:32,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:32,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:32,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:32,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-02 11:40:33,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:33,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:33,772 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:33,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:40:33,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:33,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-02 11:40:33,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:33,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:40:33,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:40:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:40:33,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:33,886 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2018-10-02 11:40:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:34,015 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2018-10-02 11:40:34,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:40:34,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-10-02 11:40:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:34,018 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:40:34,018 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:40:34,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:40:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:40:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:40:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-02 11:40:34,023 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2018-10-02 11:40:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:34,023 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-02 11:40:34,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:40:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-02 11:40:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:40:34,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:34,025 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-02 11:40:34,025 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:34,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times [2018-10-02 11:40:34,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:34,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:34,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:34,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:34,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-02 11:40:34,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:34,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:34,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:34,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-02 11:40:34,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:34,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:40:34,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:40:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:40:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:34,991 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states. [2018-10-02 11:40:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:35,122 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2018-10-02 11:40:35,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:40:35,123 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-10-02 11:40:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:35,124 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:40:35,125 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:40:35,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:40:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:40:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:40:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-02 11:40:35,131 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2018-10-02 11:40:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:35,131 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-02 11:40:35,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:40:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-02 11:40:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:40:35,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:35,132 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-02 11:40:35,133 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:35,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times [2018-10-02 11:40:35,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:35,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-02 11:40:35,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:35,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:35,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:35,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:35,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:35,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-10-02 11:40:35,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:35,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:40:35,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:40:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:40:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:35,709 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states. [2018-10-02 11:40:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:35,858 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-02 11:40:35,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:40:35,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-10-02 11:40:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:35,859 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:40:35,859 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:40:35,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:40:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:40:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:40:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-02 11:40:35,864 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-10-02 11:40:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:35,864 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-02 11:40:35,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:40:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-02 11:40:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:40:35,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:35,865 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-02 11:40:35,865 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:35,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times [2018-10-02 11:40:35,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:35,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:35,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:35,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-02 11:40:36,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:36,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:36,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:36,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:40:36,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:36,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-02 11:40:36,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:36,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:40:36,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:40:36,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:40:36,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:36,543 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2018-10-02 11:40:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:36,717 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2018-10-02 11:40:36,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:40:36,719 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-10-02 11:40:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:36,720 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:40:36,720 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:40:36,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:40:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:40:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:40:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-02 11:40:36,724 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2018-10-02 11:40:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:36,724 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-02 11:40:36,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:40:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-02 11:40:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:40:36,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:36,726 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-02 11:40:36,726 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:36,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times [2018-10-02 11:40:36,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:36,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:36,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:36,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-02 11:40:37,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:37,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:37,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:37,154 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:37,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:37,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-10-02 11:40:37,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:37,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:40:37,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:40:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:40:37,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:37,204 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states. [2018-10-02 11:40:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:37,318 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2018-10-02 11:40:37,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:40:37,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-10-02 11:40:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:37,320 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:40:37,320 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:40:37,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:40:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:40:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:40:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-02 11:40:37,325 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2018-10-02 11:40:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:37,325 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-02 11:40:37,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:40:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-02 11:40:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:40:37,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:37,326 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-02 11:40:37,326 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:37,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times [2018-10-02 11:40:37,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:37,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:37,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:37,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-02 11:40:37,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:37,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:37,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:37,859 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:40:37,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:37,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-10-02 11:40:37,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:37,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:40:37,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:40:37,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:40:37,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:37,906 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states. [2018-10-02 11:40:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:38,008 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2018-10-02 11:40:38,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:40:38,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-10-02 11:40:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:38,010 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:40:38,010 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:40:38,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:40:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:40:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:40:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-02 11:40:38,014 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-10-02 11:40:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:38,014 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-02 11:40:38,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:40:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-02 11:40:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:40:38,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:38,015 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-02 11:40:38,015 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:38,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times [2018-10-02 11:40:38,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:38,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:38,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:38,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:38,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-10-02 11:40:38,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:38,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:38,759 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:38,889 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:40:38,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:38,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-10-02 11:40:38,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:38,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:40:38,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:40:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:40:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:38,937 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2018-10-02 11:40:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:39,140 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2018-10-02 11:40:39,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:40:39,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-10-02 11:40:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:39,141 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:40:39,141 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:40:39,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:40:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:40:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:40:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-02 11:40:39,147 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2018-10-02 11:40:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:39,147 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-02 11:40:39,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:40:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-02 11:40:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:40:39,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:39,148 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-02 11:40:39,148 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:39,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times [2018-10-02 11:40:39,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:39,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:39,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:39,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-10-02 11:40:40,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:40,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:40,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:40,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-10-02 11:40:40,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:40,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:40:40,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:40:40,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:40:40,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:40,139 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states. [2018-10-02 11:40:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:40,273 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-02 11:40:40,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:40:40,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-10-02 11:40:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:40,275 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:40:40,275 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:40:40,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:40:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:40:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:40:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-02 11:40:40,281 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2018-10-02 11:40:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:40,281 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-02 11:40:40,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:40:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-02 11:40:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:40:40,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:40,282 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-02 11:40:40,282 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:40,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times [2018-10-02 11:40:40,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:40,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:40,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:40,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-02 11:40:41,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:41,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:41,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:41,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:41,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:41,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-10-02 11:40:41,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:41,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:40:41,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:40:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:40:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:41,290 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states. [2018-10-02 11:40:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:41,438 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-10-02 11:40:41,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:40:41,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-10-02 11:40:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:41,441 INFO L225 Difference]: With dead ends: 171 [2018-10-02 11:40:41,441 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:40:41,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:40:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:40:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:40:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-02 11:40:41,445 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-10-02 11:40:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:41,445 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-02 11:40:41,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:40:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-02 11:40:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:40:41,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:41,446 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-02 11:40:41,446 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:41,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times [2018-10-02 11:40:41,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:41,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:41,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:41,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-10-02 11:40:41,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:41,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:42,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:42,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:40:42,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:42,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-10-02 11:40:42,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:42,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:40:42,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:40:42,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:40:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:42,230 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2018-10-02 11:40:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:42,333 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2018-10-02 11:40:42,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:40:42,334 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-10-02 11:40:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:42,335 INFO L225 Difference]: With dead ends: 177 [2018-10-02 11:40:42,335 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:40:42,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:40:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:40:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:40:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-02 11:40:42,340 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2018-10-02 11:40:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:42,340 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-02 11:40:42,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:40:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-02 11:40:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:40:42,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:42,341 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-02 11:40:42,341 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:42,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:42,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times [2018-10-02 11:40:42,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:42,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:42,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-02 11:40:43,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:43,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:43,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:43,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:43,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:43,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-10-02 11:40:43,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:43,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:40:43,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:40:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:40:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:43,774 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states. [2018-10-02 11:40:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:44,122 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2018-10-02 11:40:44,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:40:44,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-10-02 11:40:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:44,124 INFO L225 Difference]: With dead ends: 183 [2018-10-02 11:40:44,124 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:40:44,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:40:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 11:40:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:40:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-02 11:40:44,130 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2018-10-02 11:40:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:44,130 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-02 11:40:44,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:40:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-02 11:40:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:40:44,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:44,131 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-02 11:40:44,132 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:44,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:44,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times [2018-10-02 11:40:44,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:44,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:44,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:44,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-02 11:40:44,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:44,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:44,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:44,861 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:40:44,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:44,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-10-02 11:40:44,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:44,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:40:44,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:40:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:40:44,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:44,906 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states. [2018-10-02 11:40:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:45,045 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2018-10-02 11:40:45,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:40:45,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-10-02 11:40:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:45,046 INFO L225 Difference]: With dead ends: 189 [2018-10-02 11:40:45,047 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:40:45,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:40:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:40:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:40:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-02 11:40:45,052 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-10-02 11:40:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:45,052 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-02 11:40:45,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:40:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-02 11:40:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:40:45,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:45,053 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-02 11:40:45,053 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:45,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times [2018-10-02 11:40:45,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:45,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:45,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:45,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:45,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-02 11:40:45,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:45,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:45,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:45,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:40:45,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:46,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-02 11:40:46,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:46,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:40:46,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:40:46,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:40:46,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:46,056 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2018-10-02 11:40:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:46,270 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-02 11:40:46,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:40:46,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-10-02 11:40:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:46,271 INFO L225 Difference]: With dead ends: 195 [2018-10-02 11:40:46,271 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:40:46,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:40:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:40:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:40:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-02 11:40:46,276 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2018-10-02 11:40:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:46,276 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-02 11:40:46,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:40:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-02 11:40:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:40:46,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:46,277 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-02 11:40:46,278 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:46,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times [2018-10-02 11:40:46,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:46,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:46,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:46,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-10-02 11:40:47,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:47,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:47,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:47,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-10-02 11:40:47,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:47,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:40:47,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:40:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:40:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:47,140 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states. [2018-10-02 11:40:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:48,238 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-10-02 11:40:48,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:40:48,239 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-10-02 11:40:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:48,240 INFO L225 Difference]: With dead ends: 201 [2018-10-02 11:40:48,240 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:40:48,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:48,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:40:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 11:40:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:40:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-02 11:40:48,246 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-10-02 11:40:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:48,246 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-02 11:40:48,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:40:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-02 11:40:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:40:48,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:48,247 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-02 11:40:48,247 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:48,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times [2018-10-02 11:40:48,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:48,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:48,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:48,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:48,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-02 11:40:48,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:48,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:48,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:48,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:48,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:48,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-10-02 11:40:48,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:48,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:40:48,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:40:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:40:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:48,940 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states. [2018-10-02 11:40:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:49,079 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-10-02 11:40:49,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:40:49,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-10-02 11:40:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:49,081 INFO L225 Difference]: With dead ends: 207 [2018-10-02 11:40:49,081 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:40:49,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:40:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:40:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:40:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-02 11:40:49,086 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-10-02 11:40:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:49,086 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-02 11:40:49,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:40:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-02 11:40:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:40:49,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:49,087 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-02 11:40:49,087 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:49,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times [2018-10-02 11:40:49,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:49,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:49,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:49,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-10-02 11:40:50,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:50,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:50,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:50,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:40:50,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:50,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-10-02 11:40:50,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:50,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:40:50,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:40:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:40:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:50,630 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2018-10-02 11:40:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:50,783 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2018-10-02 11:40:50,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:40:50,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-10-02 11:40:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:50,785 INFO L225 Difference]: With dead ends: 213 [2018-10-02 11:40:50,785 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:40:50,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:40:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:40:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:40:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-02 11:40:50,790 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2018-10-02 11:40:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:50,790 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-02 11:40:50,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:40:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-02 11:40:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:40:50,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:50,791 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-02 11:40:50,791 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:50,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times [2018-10-02 11:40:50,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:50,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:50,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:50,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:50,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-02 11:40:51,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:51,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:51,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:51,666 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:51,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:51,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-10-02 11:40:51,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:51,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:40:51,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:40:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:40:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:51,709 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states. [2018-10-02 11:40:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:51,915 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-10-02 11:40:51,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:40:51,915 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-10-02 11:40:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:51,916 INFO L225 Difference]: With dead ends: 219 [2018-10-02 11:40:51,916 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:40:51,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:40:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 11:40:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:40:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-02 11:40:51,921 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2018-10-02 11:40:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:51,921 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-02 11:40:51,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:40:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-02 11:40:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:40:51,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:51,922 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-02 11:40:51,923 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:51,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times [2018-10-02 11:40:51,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:51,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:51,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:51,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-10-02 11:40:53,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:53,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:53,370 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:53,919 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:40:53,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:53,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-10-02 11:40:53,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:53,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:40:53,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:40:53,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:40:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:53,973 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states. [2018-10-02 11:40:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:54,215 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-02 11:40:54,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:40:54,216 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-10-02 11:40:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:54,217 INFO L225 Difference]: With dead ends: 225 [2018-10-02 11:40:54,217 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:40:54,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:40:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 11:40:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:40:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-02 11:40:54,223 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-10-02 11:40:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:54,223 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-02 11:40:54,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:40:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-02 11:40:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:40:54,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:54,225 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-02 11:40:54,225 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:54,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times [2018-10-02 11:40:54,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:54,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:54,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:54,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:54,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-10-02 11:40:55,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:55,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:55,659 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:55,962 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:40:55,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:55,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-10-02 11:40:56,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:56,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:40:56,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:40:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:40:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:56,021 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2018-10-02 11:40:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:56,237 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2018-10-02 11:40:56,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:40:56,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-10-02 11:40:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:56,239 INFO L225 Difference]: With dead ends: 231 [2018-10-02 11:40:56,239 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:40:56,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:40:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 11:40:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:40:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-02 11:40:56,245 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2018-10-02 11:40:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:56,245 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-02 11:40:56,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:40:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-02 11:40:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:40:56,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:56,246 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-02 11:40:56,247 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:56,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:56,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times [2018-10-02 11:40:56,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:56,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:56,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:56,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:56,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-10-02 11:40:57,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:57,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:57,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:57,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-10-02 11:40:57,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:57,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:40:57,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:40:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:40:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:57,403 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-10-02 11:40:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:58,596 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2018-10-02 11:40:58,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:40:58,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-10-02 11:40:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:58,598 INFO L225 Difference]: With dead ends: 237 [2018-10-02 11:40:58,598 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:40:58,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:40:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-02 11:40:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:40:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-02 11:40:58,604 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2018-10-02 11:40:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:58,605 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-02 11:40:58,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:40:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-02 11:40:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:40:58,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:58,606 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-02 11:40:58,606 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:58,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times [2018-10-02 11:40:58,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:58,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:58,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:58,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:58,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-02 11:40:59,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:59,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:59,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:59,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:59,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:59,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-10-02 11:40:59,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:59,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:40:59,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:40:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:40:59,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:59,590 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states. [2018-10-02 11:41:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:00,901 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2018-10-02 11:41:00,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:41:00,901 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-02 11:41:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:00,903 INFO L225 Difference]: With dead ends: 243 [2018-10-02 11:41:00,903 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:41:00,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:41:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:41:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-02 11:41:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:41:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-02 11:41:00,909 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-10-02 11:41:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:00,909 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-02 11:41:00,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:41:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-02 11:41:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 11:41:00,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:00,910 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-02 11:41:00,910 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:00,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times [2018-10-02 11:41:00,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:00,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:00,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:00,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:00,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-02 11:41:01,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:01,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:01,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:02,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:41:02,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:02,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-10-02 11:41:02,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:02,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:41:02,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:41:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:41:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:41:02,497 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states. [2018-10-02 11:41:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:02,667 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2018-10-02 11:41:02,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:41:02,667 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-10-02 11:41:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:02,669 INFO L225 Difference]: With dead ends: 249 [2018-10-02 11:41:02,669 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:41:02,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:41:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:41:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-02 11:41:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:41:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-02 11:41:02,675 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2018-10-02 11:41:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:02,675 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-02 11:41:02,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:41:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-02 11:41:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 11:41:02,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:02,676 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-02 11:41:02,676 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:02,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times [2018-10-02 11:41:02,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:02,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:02,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:02,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:02,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-10-02 11:41:03,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:03,448 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 11:41:03,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:03,523 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:03,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:03,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-10-02 11:41:03,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:03,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:41:03,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:41:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:41:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:41:03,589 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states. [2018-10-02 11:41:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:03,932 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-02 11:41:03,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:41:03,933 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-10-02 11:41:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:03,934 INFO L225 Difference]: With dead ends: 255 [2018-10-02 11:41:03,934 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:41:03,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:41:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:41:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-02 11:41:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 11:41:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-02 11:41:03,939 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2018-10-02 11:41:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:03,940 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-02 11:41:03,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:41:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-02 11:41:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:41:03,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:03,941 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-02 11:41:03,941 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:03,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times [2018-10-02 11:41:03,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:03,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:03,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:03,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:03,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-02 11:41:04,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:04,951 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 11:41:04,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:05,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:41:05,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:05,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-10-02 11:41:05,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:05,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:41:05,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:41:05,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:41:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:41:05,836 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states. [2018-10-02 11:41:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:06,068 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2018-10-02 11:41:06,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:41:06,069 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-10-02 11:41:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:06,070 INFO L225 Difference]: With dead ends: 261 [2018-10-02 11:41:06,070 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 11:41:06,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:41:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 11:41:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-02 11:41:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:41:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-02 11:41:06,076 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2018-10-02 11:41:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:06,077 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-02 11:41:06,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:41:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-02 11:41:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 11:41:06,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:06,078 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-02 11:41:06,078 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:06,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times [2018-10-02 11:41:06,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:06,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:06,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:06,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:06,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-10-02 11:41:07,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:07,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:07,088 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:07,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:41:07,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:07,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-10-02 11:41:07,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:07,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:41:07,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:41:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:41:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:41:07,630 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states. [2018-10-02 11:41:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:08,016 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2018-10-02 11:41:08,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:41:08,017 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-10-02 11:41:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:08,018 INFO L225 Difference]: With dead ends: 267 [2018-10-02 11:41:08,018 INFO L226 Difference]: Without dead ends: 179 [2018-10-02 11:41:08,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:41:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-02 11:41:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-02 11:41:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 11:41:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-02 11:41:08,024 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2018-10-02 11:41:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:08,025 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-02 11:41:08,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:41:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-02 11:41:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 11:41:08,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:08,026 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-02 11:41:08,026 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:08,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times [2018-10-02 11:41:08,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:08,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:08,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-10-02 11:41:08,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:08,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:08,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:09,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-10-02 11:41:09,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:09,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:41:09,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:41:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:41:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:41:09,072 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states. [2018-10-02 11:41:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:09,305 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2018-10-02 11:41:09,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:41:09,306 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-10-02 11:41:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:09,307 INFO L225 Difference]: With dead ends: 273 [2018-10-02 11:41:09,307 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:41:09,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:41:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:41:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-02 11:41:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-02 11:41:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-02 11:41:09,312 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2018-10-02 11:41:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:09,313 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-02 11:41:09,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:41:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-02 11:41:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:41:09,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:09,313 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-02 11:41:09,314 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:09,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times [2018-10-02 11:41:09,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:09,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:09,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:09,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:09,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-02 11:41:11,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:11,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:11,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:11,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:11,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:11,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-02 11:41:11,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:11,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:41:11,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:41:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:41:11,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:41:11,575 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states. [2018-10-02 11:41:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:11,757 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2018-10-02 11:41:11,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:41:11,758 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-10-02 11:41:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:11,759 INFO L225 Difference]: With dead ends: 279 [2018-10-02 11:41:11,759 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:41:11,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:41:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:41:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-02 11:41:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 11:41:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-02 11:41:11,764 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2018-10-02 11:41:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:11,764 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-02 11:41:11,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:41:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-02 11:41:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-02 11:41:11,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:11,765 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-02 11:41:11,765 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:11,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times [2018-10-02 11:41:11,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:11,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:11,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-10-02 11:41:12,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:12,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:41:12,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:13,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:41:13,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:13,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-10-02 11:41:13,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:13,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:41:13,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:41:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:41:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:41:13,956 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states. [2018-10-02 11:41:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:14,251 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-10-02 11:41:14,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:41:14,252 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-10-02 11:41:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:14,254 INFO L225 Difference]: With dead ends: 285 [2018-10-02 11:41:14,254 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 11:41:14,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:41:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 11:41:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-02 11:41:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 11:41:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-02 11:41:14,259 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2018-10-02 11:41:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:14,260 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-02 11:41:14,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:41:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-02 11:41:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-02 11:41:14,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:14,261 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-02 11:41:14,261 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:14,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times [2018-10-02 11:41:14,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:14,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:14,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:14,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:14,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-10-02 11:41:16,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:16,158 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 11:41:16,166 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:16,239 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:16,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:16,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-10-02 11:41:16,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:16,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:41:16,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:41:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:41:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:41:16,298 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states. [2018-10-02 11:41:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:16,512 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2018-10-02 11:41:16,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:41:16,512 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-10-02 11:41:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:16,514 INFO L225 Difference]: With dead ends: 291 [2018-10-02 11:41:16,515 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:41:16,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:41:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:41:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-02 11:41:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-02 11:41:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-02 11:41:16,520 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2018-10-02 11:41:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:16,521 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-02 11:41:16,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:41:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-02 11:41:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 11:41:16,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:16,522 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-02 11:41:16,522 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:16,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times [2018-10-02 11:41:16,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:16,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:16,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:16,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:16,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-10-02 11:41:17,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:17,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:17,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:19,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:41:19,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:19,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-10-02 11:41:19,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:19,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:41:19,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:41:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:41:19,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:19,170 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states. [2018-10-02 11:41:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:19,681 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2018-10-02 11:41:19,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:41:19,681 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-10-02 11:41:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:19,682 INFO L225 Difference]: With dead ends: 297 [2018-10-02 11:41:19,683 INFO L226 Difference]: Without dead ends: 199 [2018-10-02 11:41:19,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-02 11:41:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-02 11:41:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 11:41:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-02 11:41:19,688 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2018-10-02 11:41:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:19,689 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-02 11:41:19,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:41:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-02 11:41:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-02 11:41:19,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:19,690 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-02 11:41:19,690 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:19,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times [2018-10-02 11:41:19,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:19,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:19,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:19,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:19,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-10-02 11:41:21,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:21,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:21,090 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:21,812 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:41:21,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:21,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-10-02 11:41:21,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:21,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:41:21,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:41:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:41:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:21,871 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states. [2018-10-02 11:41:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:22,131 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2018-10-02 11:41:22,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:41:22,132 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-02 11:41:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:22,133 INFO L225 Difference]: With dead ends: 303 [2018-10-02 11:41:22,133 INFO L226 Difference]: Without dead ends: 203 [2018-10-02 11:41:22,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-02 11:41:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-02 11:41:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-02 11:41:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-02 11:41:22,139 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-10-02 11:41:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:22,139 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-02 11:41:22,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:41:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-02 11:41:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-02 11:41:22,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:22,140 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-02 11:41:22,140 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:22,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times [2018-10-02 11:41:22,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:22,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:22,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:22,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:22,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-10-02 11:41:23,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:23,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:23,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:23,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-10-02 11:41:23,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:23,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:41:23,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:41:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:41:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:23,376 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states. [2018-10-02 11:41:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:23,692 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2018-10-02 11:41:23,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:41:23,693 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-10-02 11:41:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:23,695 INFO L225 Difference]: With dead ends: 309 [2018-10-02 11:41:23,695 INFO L226 Difference]: Without dead ends: 207 [2018-10-02 11:41:23,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-02 11:41:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-02 11:41:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-02 11:41:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-10-02 11:41:23,700 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-10-02 11:41:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:23,701 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-10-02 11:41:23,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:41:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-10-02 11:41:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-02 11:41:23,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:23,702 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-10-02 11:41:23,702 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:23,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:23,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times [2018-10-02 11:41:23,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:23,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:23,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:23,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:23,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-10-02 11:41:24,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:24,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:24,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:24,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:24,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:24,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-10-02 11:41:24,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:24,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:41:24,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:41:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:41:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:24,964 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states. [2018-10-02 11:41:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:25,811 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-10-02 11:41:25,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:41:25,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-10-02 11:41:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:25,812 INFO L225 Difference]: With dead ends: 315 [2018-10-02 11:41:25,812 INFO L226 Difference]: Without dead ends: 211 [2018-10-02 11:41:25,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-02 11:41:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-02 11:41:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-02 11:41:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-10-02 11:41:25,818 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2018-10-02 11:41:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:25,818 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-10-02 11:41:25,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:41:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-10-02 11:41:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-02 11:41:25,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:25,819 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-10-02 11:41:25,820 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:25,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times [2018-10-02 11:41:25,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:25,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:25,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:25,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:25,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-10-02 11:41:27,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:27,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:27,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:28,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:41:28,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:28,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-10-02 11:41:28,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:28,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:41:28,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:41:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:41:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:28,298 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states. [2018-10-02 11:41:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:29,179 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-10-02 11:41:29,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:41:29,179 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-10-02 11:41:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:29,180 INFO L225 Difference]: With dead ends: 321 [2018-10-02 11:41:29,180 INFO L226 Difference]: Without dead ends: 215 [2018-10-02 11:41:29,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-02 11:41:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-02 11:41:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-02 11:41:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-10-02 11:41:29,186 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2018-10-02 11:41:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:29,186 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-10-02 11:41:29,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:41:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-10-02 11:41:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-02 11:41:29,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:29,188 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-10-02 11:41:29,188 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:29,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times [2018-10-02 11:41:29,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:29,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:29,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:29,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:29,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-10-02 11:41:30,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:30,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:30,387 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:30,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:30,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:30,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-10-02 11:41:30,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:30,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:41:30,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:41:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:41:30,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:30,534 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states. [2018-10-02 11:41:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:30,871 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2018-10-02 11:41:30,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:41:30,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-10-02 11:41:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:30,872 INFO L225 Difference]: With dead ends: 327 [2018-10-02 11:41:30,872 INFO L226 Difference]: Without dead ends: 219 [2018-10-02 11:41:30,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-02 11:41:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-02 11:41:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-02 11:41:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-02 11:41:30,878 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2018-10-02 11:41:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:30,878 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-02 11:41:30,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:41:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-02 11:41:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-02 11:41:30,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:30,880 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-10-02 11:41:30,880 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:30,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times [2018-10-02 11:41:30,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:30,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:30,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:30,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:30,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-10-02 11:41:32,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:32,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:32,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:33,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:41:33,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:33,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-10-02 11:41:34,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:34,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:41:34,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:41:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:41:34,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:34,036 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states. [2018-10-02 11:41:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:34,529 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2018-10-02 11:41:34,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:41:34,530 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-10-02 11:41:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:34,531 INFO L225 Difference]: With dead ends: 333 [2018-10-02 11:41:34,531 INFO L226 Difference]: Without dead ends: 223 [2018-10-02 11:41:34,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-02 11:41:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-02 11:41:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-02 11:41:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-10-02 11:41:34,536 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2018-10-02 11:41:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:34,536 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-10-02 11:41:34,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:41:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-10-02 11:41:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-02 11:41:34,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:34,537 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-10-02 11:41:34,537 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:34,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times [2018-10-02 11:41:34,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:34,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:34,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:34,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:34,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-02 11:41:36,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:36,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:36,038 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:36,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:41:36,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:36,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-02 11:41:37,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:37,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:41:37,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:41:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:41:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:37,005 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states. [2018-10-02 11:41:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:37,336 INFO L93 Difference]: Finished difference Result 339 states and 342 transitions. [2018-10-02 11:41:37,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:41:37,336 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-10-02 11:41:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:37,338 INFO L225 Difference]: With dead ends: 339 [2018-10-02 11:41:37,338 INFO L226 Difference]: Without dead ends: 227 [2018-10-02 11:41:37,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-02 11:41:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-02 11:41:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-02 11:41:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-02 11:41:37,343 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2018-10-02 11:41:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:37,344 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-02 11:41:37,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:41:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-02 11:41:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-02 11:41:37,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:37,345 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-10-02 11:41:37,345 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:37,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times [2018-10-02 11:41:37,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:37,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:37,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:37,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-02 11:41:38,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:38,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:38,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:38,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-02 11:41:38,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:38,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:41:38,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:41:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:41:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:38,875 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states. [2018-10-02 11:41:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:39,182 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-10-02 11:41:39,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:41:39,183 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-10-02 11:41:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:39,184 INFO L225 Difference]: With dead ends: 345 [2018-10-02 11:41:39,185 INFO L226 Difference]: Without dead ends: 231 [2018-10-02 11:41:39,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-02 11:41:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-02 11:41:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-02 11:41:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-10-02 11:41:39,191 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2018-10-02 11:41:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:39,192 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-10-02 11:41:39,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:41:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-10-02 11:41:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-02 11:41:39,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:39,193 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-10-02 11:41:39,193 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:39,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:39,194 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times [2018-10-02 11:41:39,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:39,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:39,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:39,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:39,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-10-02 11:41:40,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:40,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:40,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:40,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:40,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:40,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-10-02 11:41:40,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:40,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:41:40,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:41:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:41:40,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:40,704 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states. [2018-10-02 11:41:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:41,113 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2018-10-02 11:41:41,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:41:41,113 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-10-02 11:41:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:41,114 INFO L225 Difference]: With dead ends: 351 [2018-10-02 11:41:41,114 INFO L226 Difference]: Without dead ends: 235 [2018-10-02 11:41:41,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-02 11:41:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-02 11:41:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-02 11:41:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-10-02 11:41:41,119 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2018-10-02 11:41:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:41,119 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-10-02 11:41:41,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:41:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-10-02 11:41:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-02 11:41:41,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:41,120 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-10-02 11:41:41,120 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:41,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:41,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times [2018-10-02 11:41:41,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:41,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:41,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:41,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:41,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-10-02 11:41:42,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:42,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:42,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:44,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:41:44,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:44,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-10-02 11:41:44,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:44,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:41:44,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:41:44,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:41:44,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:44,416 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states. [2018-10-02 11:41:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:44,968 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2018-10-02 11:41:44,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:41:44,969 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-10-02 11:41:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:44,971 INFO L225 Difference]: With dead ends: 357 [2018-10-02 11:41:44,971 INFO L226 Difference]: Without dead ends: 239 [2018-10-02 11:41:44,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-02 11:41:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-10-02 11:41:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-02 11:41:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-10-02 11:41:44,976 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2018-10-02 11:41:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:44,976 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-10-02 11:41:44,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:41:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-10-02 11:41:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-02 11:41:44,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:44,977 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-10-02 11:41:44,978 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:44,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times [2018-10-02 11:41:44,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:44,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:44,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:44,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:44,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-10-02 11:41:46,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:46,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:46,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:46,734 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:46,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:46,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-10-02 11:41:46,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:46,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:41:46,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:41:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:41:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:46,827 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states. [2018-10-02 11:41:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:47,171 INFO L93 Difference]: Finished difference Result 363 states and 366 transitions. [2018-10-02 11:41:47,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:41:47,171 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-10-02 11:41:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:47,173 INFO L225 Difference]: With dead ends: 363 [2018-10-02 11:41:47,173 INFO L226 Difference]: Without dead ends: 243 [2018-10-02 11:41:47,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-02 11:41:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-02 11:41:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-02 11:41:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-10-02 11:41:47,179 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2018-10-02 11:41:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:47,179 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-10-02 11:41:47,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:41:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-10-02 11:41:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-02 11:41:47,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:47,181 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-10-02 11:41:47,181 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:47,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times [2018-10-02 11:41:47,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:47,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:47,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:47,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:47,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-10-02 11:41:48,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:48,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:48,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:51,241 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:41:51,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:51,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-10-02 11:41:51,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:51,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:41:51,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:41:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:41:51,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:51,324 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states. [2018-10-02 11:41:51,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:51,829 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2018-10-02 11:41:51,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:41:51,829 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-10-02 11:41:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:51,831 INFO L225 Difference]: With dead ends: 369 [2018-10-02 11:41:51,831 INFO L226 Difference]: Without dead ends: 247 [2018-10-02 11:41:51,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-02 11:41:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-10-02 11:41:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-02 11:41:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-10-02 11:41:51,837 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2018-10-02 11:41:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:51,838 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-10-02 11:41:51,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:41:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-10-02 11:41:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-02 11:41:51,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:51,839 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-10-02 11:41:51,839 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:51,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times [2018-10-02 11:41:51,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:51,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:51,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:51,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:51,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-10-02 11:41:53,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:53,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:53,359 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:54,856 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:41:54,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:54,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-10-02 11:41:54,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:54,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:41:54,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:41:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:41:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:54,965 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states. [2018-10-02 11:41:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:55,300 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-10-02 11:41:55,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:41:55,301 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-10-02 11:41:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:55,302 INFO L225 Difference]: With dead ends: 375 [2018-10-02 11:41:55,302 INFO L226 Difference]: Without dead ends: 251 [2018-10-02 11:41:55,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-02 11:41:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-02 11:41:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-02 11:41:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-10-02 11:41:55,308 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2018-10-02 11:41:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:55,308 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-10-02 11:41:55,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:41:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-10-02 11:41:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-02 11:41:55,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:55,309 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-10-02 11:41:55,309 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:55,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times [2018-10-02 11:41:55,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:55,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:55,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:55,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:55,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-02 11:41:57,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:57,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:57,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:57,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-02 11:41:57,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:57,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:41:57,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:41:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:41:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:57,423 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states. [2018-10-02 11:41:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:57,783 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2018-10-02 11:41:57,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:41:57,783 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-10-02 11:41:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:57,784 INFO L225 Difference]: With dead ends: 381 [2018-10-02 11:41:57,784 INFO L226 Difference]: Without dead ends: 255 [2018-10-02 11:41:57,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-02 11:41:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-02 11:41:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-02 11:41:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-10-02 11:41:57,788 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2018-10-02 11:41:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:57,789 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-10-02 11:41:57,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:41:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-10-02 11:41:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-02 11:41:57,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:57,790 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-10-02 11:41:57,790 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:57,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:57,790 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times [2018-10-02 11:41:57,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:57,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:57,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:57,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:57,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-10-02 11:41:59,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:59,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:59,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:59,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:59,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:59,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-10-02 11:41:59,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:59,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:41:59,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:41:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:41:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:41:59,620 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states. [2018-10-02 11:42:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:00,122 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2018-10-02 11:42:00,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:42:00,122 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-10-02 11:42:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:00,124 INFO L225 Difference]: With dead ends: 387 [2018-10-02 11:42:00,124 INFO L226 Difference]: Without dead ends: 259 [2018-10-02 11:42:00,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:42:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-02 11:42:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-02 11:42:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-02 11:42:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-10-02 11:42:00,129 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2018-10-02 11:42:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:00,129 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-10-02 11:42:00,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:42:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-10-02 11:42:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-02 11:42:00,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:00,131 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-10-02 11:42:00,131 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:00,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times [2018-10-02 11:42:00,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:00,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:00,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:00,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-10-02 11:42:02,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:02,051 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 11:42:02,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:04,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:42:04,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:04,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-10-02 11:42:04,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:04,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:42:04,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:42:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:42:04,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:42:04,572 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states. [2018-10-02 11:42:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:05,132 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2018-10-02 11:42:05,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:42:05,132 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-10-02 11:42:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:05,133 INFO L225 Difference]: With dead ends: 393 [2018-10-02 11:42:05,133 INFO L226 Difference]: Without dead ends: 263 [2018-10-02 11:42:05,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:42:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-02 11:42:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-10-02 11:42:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-02 11:42:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-10-02 11:42:05,140 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2018-10-02 11:42:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:05,140 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-10-02 11:42:05,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:42:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-10-02 11:42:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-02 11:42:05,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:05,142 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-10-02 11:42:05,142 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:05,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times [2018-10-02 11:42:05,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:05,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:05,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:05,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:05,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-10-02 11:42:07,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:07,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:07,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:07,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:07,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:07,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-10-02 11:42:07,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:07,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:42:07,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:42:07,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:42:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:42:07,409 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states. [2018-10-02 11:42:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:07,918 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2018-10-02 11:42:07,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:42:07,918 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-10-02 11:42:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:07,920 INFO L225 Difference]: With dead ends: 399 [2018-10-02 11:42:07,920 INFO L226 Difference]: Without dead ends: 267 [2018-10-02 11:42:07,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:42:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-02 11:42:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-02 11:42:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-02 11:42:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-10-02 11:42:07,927 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2018-10-02 11:42:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:07,927 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-10-02 11:42:07,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:42:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-10-02 11:42:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-02 11:42:07,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:07,929 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-10-02 11:42:07,929 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:07,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times [2018-10-02 11:42:07,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:07,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:07,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:07,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-10-02 11:42:09,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:09,709 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 11:42:09,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:13,056 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:42:13,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:13,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-10-02 11:42:13,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:13,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:42:13,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:42:13,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:42:13,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:42:13,148 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states. [2018-10-02 11:42:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:13,683 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-10-02 11:42:13,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:42:13,683 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-10-02 11:42:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:13,685 INFO L225 Difference]: With dead ends: 405 [2018-10-02 11:42:13,685 INFO L226 Difference]: Without dead ends: 271 [2018-10-02 11:42:13,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:42:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-02 11:42:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-02 11:42:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-02 11:42:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-10-02 11:42:13,690 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-10-02 11:42:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:13,690 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-10-02 11:42:13,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:42:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-10-02 11:42:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-02 11:42:13,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:13,692 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-10-02 11:42:13,692 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:13,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times [2018-10-02 11:42:13,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:13,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:13,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-10-02 11:42:15,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:15,454 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 11:42:15,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:17,255 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:42:17,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:17,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-10-02 11:42:17,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:17,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:42:17,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:42:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:42:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:42:17,365 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states. [2018-10-02 11:42:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:18,004 INFO L93 Difference]: Finished difference Result 411 states and 414 transitions. [2018-10-02 11:42:18,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:42:18,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-10-02 11:42:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:18,007 INFO L225 Difference]: With dead ends: 411 [2018-10-02 11:42:18,007 INFO L226 Difference]: Without dead ends: 275 [2018-10-02 11:42:18,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:42:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-02 11:42:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-02 11:42:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-02 11:42:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-10-02 11:42:18,012 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-10-02 11:42:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:18,012 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-10-02 11:42:18,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:42:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-10-02 11:42:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-02 11:42:18,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:18,014 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-10-02 11:42:18,014 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:18,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times [2018-10-02 11:42:18,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:18,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:18,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:18,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:18,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-10-02 11:42:19,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:19,770 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 11:42:19,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:19,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-10-02 11:42:19,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:19,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:42:19,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:42:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:42:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:42:19,963 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states. [2018-10-02 11:42:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:20,622 INFO L93 Difference]: Finished difference Result 417 states and 420 transitions. [2018-10-02 11:42:20,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:42:20,622 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-10-02 11:42:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:20,624 INFO L225 Difference]: With dead ends: 417 [2018-10-02 11:42:20,624 INFO L226 Difference]: Without dead ends: 279 [2018-10-02 11:42:20,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:42:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-02 11:42:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-02 11:42:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-02 11:42:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-10-02 11:42:20,630 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2018-10-02 11:42:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:20,630 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-10-02 11:42:20,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:42:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-10-02 11:42:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-02 11:42:20,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:20,632 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-10-02 11:42:20,632 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:20,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times [2018-10-02 11:42:20,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:20,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:20,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:20,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:20,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-10-02 11:42:22,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:22,804 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 11:42:22,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:22,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:22,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:22,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-10-02 11:42:23,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:23,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:42:23,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:42:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:42:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:23,015 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states. [2018-10-02 11:42:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:23,468 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2018-10-02 11:42:23,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:42:23,468 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-02 11:42:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:23,470 INFO L225 Difference]: With dead ends: 423 [2018-10-02 11:42:23,470 INFO L226 Difference]: Without dead ends: 283 [2018-10-02 11:42:23,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-02 11:42:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-02 11:42:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-02 11:42:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-10-02 11:42:23,475 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2018-10-02 11:42:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:23,475 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-10-02 11:42:23,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:42:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-10-02 11:42:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-02 11:42:23,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:23,477 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-10-02 11:42:23,477 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:23,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times [2018-10-02 11:42:23,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:23,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:23,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:23,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:23,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-10-02 11:42:25,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:25,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:42:25,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:28,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:42:28,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:28,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-10-02 11:42:28,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:28,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:42:28,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:42:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:42:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:42:28,896 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states. [2018-10-02 11:42:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:29,455 INFO L93 Difference]: Finished difference Result 429 states and 432 transitions. [2018-10-02 11:42:29,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:42:29,456 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-10-02 11:42:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:29,457 INFO L225 Difference]: With dead ends: 429 [2018-10-02 11:42:29,457 INFO L226 Difference]: Without dead ends: 287 [2018-10-02 11:42:29,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:42:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-02 11:42:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-10-02 11:42:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-02 11:42:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-10-02 11:42:29,462 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2018-10-02 11:42:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:29,462 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-10-02 11:42:29,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:42:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-10-02 11:42:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-02 11:42:29,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:29,463 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-10-02 11:42:29,463 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:29,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times [2018-10-02 11:42:29,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:29,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:29,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:29,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:29,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-10-02 11:42:31,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:31,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:31,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:31,504 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:31,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:31,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-10-02 11:42:31,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:31,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:42:31,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:42:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:42:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:42:31,581 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states. [2018-10-02 11:42:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:32,328 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-10-02 11:42:32,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:42:32,328 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-10-02 11:42:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:32,329 INFO L225 Difference]: With dead ends: 435 [2018-10-02 11:42:32,329 INFO L226 Difference]: Without dead ends: 291 [2018-10-02 11:42:32,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:42:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-02 11:42:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-02 11:42:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-02 11:42:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-10-02 11:42:32,334 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2018-10-02 11:42:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:32,334 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-10-02 11:42:32,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:42:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-10-02 11:42:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-02 11:42:32,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:32,335 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-10-02 11:42:32,336 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:32,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times [2018-10-02 11:42:32,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:32,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:32,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:32,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:32,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-10-02 11:42:34,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:34,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:34,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:39,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:42:39,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:39,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-10-02 11:42:39,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:39,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:42:39,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:42:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:42:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:42:39,679 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states. [2018-10-02 11:42:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:40,192 INFO L93 Difference]: Finished difference Result 441 states and 444 transitions. [2018-10-02 11:42:40,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:42:40,193 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-10-02 11:42:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:40,194 INFO L225 Difference]: With dead ends: 441 [2018-10-02 11:42:40,194 INFO L226 Difference]: Without dead ends: 295 [2018-10-02 11:42:40,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:42:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-02 11:42:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-02 11:42:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-02 11:42:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-10-02 11:42:40,200 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2018-10-02 11:42:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:40,200 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-10-02 11:42:40,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:42:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-10-02 11:42:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-02 11:42:40,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:40,202 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-10-02 11:42:40,202 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:40,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times [2018-10-02 11:42:40,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:40,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:40,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-10-02 11:42:42,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:42,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:42,312 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:45,078 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 11:42:45,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:45,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-10-02 11:42:45,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:45,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:42:45,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:42:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:42:45,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:42:45,172 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states. [2018-10-02 11:42:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:45,877 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2018-10-02 11:42:45,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:42:45,878 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-10-02 11:42:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:45,880 INFO L225 Difference]: With dead ends: 447 [2018-10-02 11:42:45,881 INFO L226 Difference]: Without dead ends: 299 [2018-10-02 11:42:45,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:42:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-02 11:42:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-02 11:42:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-02 11:42:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-10-02 11:42:45,887 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2018-10-02 11:42:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:45,887 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-10-02 11:42:45,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:42:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-10-02 11:42:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-02 11:42:45,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:45,889 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-10-02 11:42:45,890 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:45,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times [2018-10-02 11:42:45,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:45,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:45,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:45,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:45,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-10-02 11:42:48,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:48,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:48,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:48,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-10-02 11:42:48,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:48,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:42:48,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:42:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:42:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:42:48,470 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states. [2018-10-02 11:42:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:49,075 INFO L93 Difference]: Finished difference Result 453 states and 456 transitions. [2018-10-02 11:42:49,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:42:49,076 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-10-02 11:42:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:49,078 INFO L225 Difference]: With dead ends: 453 [2018-10-02 11:42:49,078 INFO L226 Difference]: Without dead ends: 303 [2018-10-02 11:42:49,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:42:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-02 11:42:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-10-02 11:42:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-02 11:42:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-10-02 11:42:49,083 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2018-10-02 11:42:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:49,083 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-10-02 11:42:49,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:42:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-10-02 11:42:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-02 11:42:49,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:49,084 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-10-02 11:42:49,084 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:49,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times [2018-10-02 11:42:49,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:49,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:49,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:49,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-10-02 11:42:51,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:51,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:51,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:51,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:51,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:51,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-10-02 11:42:51,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:51,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:42:51,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:42:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:42:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:42:51,599 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states. [2018-10-02 11:42:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:52,339 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-10-02 11:42:52,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:42:52,339 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-10-02 11:42:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:52,341 INFO L225 Difference]: With dead ends: 459 [2018-10-02 11:42:52,341 INFO L226 Difference]: Without dead ends: 307 [2018-10-02 11:42:52,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:42:52,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-02 11:42:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-02 11:42:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-02 11:42:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-10-02 11:42:52,348 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2018-10-02 11:42:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:52,348 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-10-02 11:42:52,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:42:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-10-02 11:42:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-02 11:42:52,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:52,350 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-10-02 11:42:52,350 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:52,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:52,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times [2018-10-02 11:42:52,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:52,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:52,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:52,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:52,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-10-02 11:42:54,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:54,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:54,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:59,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 11:42:59,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:59,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-10-02 11:42:59,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:59,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:42:59,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:42:59,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:42:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:42:59,661 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states. [2018-10-02 11:43:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:00,486 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2018-10-02 11:43:00,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:43:00,486 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-10-02 11:43:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:00,488 INFO L225 Difference]: With dead ends: 465 [2018-10-02 11:43:00,488 INFO L226 Difference]: Without dead ends: 311 [2018-10-02 11:43:00,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:43:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-02 11:43:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-10-02 11:43:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-02 11:43:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-10-02 11:43:00,493 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2018-10-02 11:43:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:00,494 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-10-02 11:43:00,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:43:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-10-02 11:43:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-02 11:43:00,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:00,495 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-10-02 11:43:00,495 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:00,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times [2018-10-02 11:43:00,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:00,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:00,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:00,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:00,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-10-02 11:43:02,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:02,739 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 11:43:02,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:02,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:02,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:02,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-10-02 11:43:02,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:02,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:43:02,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:43:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:43:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:43:02,960 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states. [2018-10-02 11:43:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:03,773 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2018-10-02 11:43:03,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:43:03,774 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-10-02 11:43:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:03,776 INFO L225 Difference]: With dead ends: 471 [2018-10-02 11:43:03,776 INFO L226 Difference]: Without dead ends: 315 [2018-10-02 11:43:03,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:43:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-02 11:43:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-02 11:43:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-02 11:43:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-10-02 11:43:03,781 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2018-10-02 11:43:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:03,781 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-10-02 11:43:03,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 11:43:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-10-02 11:43:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-02 11:43:03,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:03,782 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-10-02 11:43:03,782 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:03,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:03,783 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times [2018-10-02 11:43:03,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:03,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:03,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:03,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:03,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-10-02 11:43:06,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:06,064 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 11:43:06,073 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:15,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 11:43:15,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:15,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-10-02 11:43:15,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:15,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:43:15,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:43:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:43:15,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:43:15,602 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states. [2018-10-02 11:43:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:16,521 INFO L93 Difference]: Finished difference Result 477 states and 480 transitions. [2018-10-02 11:43:16,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:43:16,522 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-10-02 11:43:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:16,524 INFO L225 Difference]: With dead ends: 477 [2018-10-02 11:43:16,524 INFO L226 Difference]: Without dead ends: 319 [2018-10-02 11:43:16,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:43:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-02 11:43:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-10-02 11:43:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-02 11:43:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-10-02 11:43:16,530 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2018-10-02 11:43:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:16,530 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-10-02 11:43:16,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:43:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-10-02 11:43:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-02 11:43:16,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:16,532 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-10-02 11:43:16,532 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:16,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times [2018-10-02 11:43:16,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:16,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:16,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:16,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:16,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-10-02 11:43:19,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:19,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:43:19,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:22,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 11:43:22,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:22,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-10-02 11:43:22,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:22,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 11:43:22,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 11:43:22,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 11:43:22,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:43:22,984 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states. [2018-10-02 11:43:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:23,742 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2018-10-02 11:43:23,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:43:23,742 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-10-02 11:43:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:23,743 INFO L225 Difference]: With dead ends: 483 [2018-10-02 11:43:23,743 INFO L226 Difference]: Without dead ends: 323 [2018-10-02 11:43:23,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:43:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-02 11:43:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-02 11:43:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-02 11:43:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-10-02 11:43:23,748 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2018-10-02 11:43:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:23,748 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-10-02 11:43:23,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 11:43:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-10-02 11:43:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-02 11:43:23,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:23,750 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-10-02 11:43:23,750 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:23,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times [2018-10-02 11:43:23,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:23,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:23,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:23,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-10-02 11:43:26,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:26,170 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 11:43:26,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:26,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-10-02 11:43:26,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:26,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:43:26,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:43:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:43:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:43:26,413 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states. [2018-10-02 11:43:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:27,338 INFO L93 Difference]: Finished difference Result 489 states and 492 transitions. [2018-10-02 11:43:27,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:43:27,339 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-10-02 11:43:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:27,341 INFO L225 Difference]: With dead ends: 489 [2018-10-02 11:43:27,341 INFO L226 Difference]: Without dead ends: 327 [2018-10-02 11:43:27,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:43:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-02 11:43:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-10-02 11:43:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-10-02 11:43:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-10-02 11:43:27,346 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2018-10-02 11:43:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:27,346 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-10-02 11:43:27,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:43:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-10-02 11:43:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-02 11:43:27,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:27,348 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-10-02 11:43:27,348 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:27,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:27,348 INFO L82 PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times [2018-10-02 11:43:27,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:27,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:27,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:27,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:27,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-10-02 11:43:30,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:30,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:30,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:30,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:30,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:30,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-10-02 11:43:30,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:30,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 11:43:30,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:43:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:43:30,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:43:30,465 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states. [2018-10-02 11:43:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:31,421 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2018-10-02 11:43:31,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:43:31,422 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-10-02 11:43:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:31,423 INFO L225 Difference]: With dead ends: 495 [2018-10-02 11:43:31,424 INFO L226 Difference]: Without dead ends: 331 [2018-10-02 11:43:31,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:43:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-02 11:43:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-02 11:43:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-02 11:43:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-10-02 11:43:31,429 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2018-10-02 11:43:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:31,429 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-10-02 11:43:31,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:43:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-10-02 11:43:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-02 11:43:31,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:31,431 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-10-02 11:43:31,431 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:31,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times [2018-10-02 11:43:31,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:31,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:31,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:31,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:31,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-10-02 11:43:34,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:34,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:34,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:40,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-02 11:43:40,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:40,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-10-02 11:43:40,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:40,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:43:40,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:43:40,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:43:40,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:43:40,705 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states. [2018-10-02 11:43:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:41,706 INFO L93 Difference]: Finished difference Result 501 states and 504 transitions. [2018-10-02 11:43:41,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:43:41,707 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-10-02 11:43:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:41,708 INFO L225 Difference]: With dead ends: 501 [2018-10-02 11:43:41,709 INFO L226 Difference]: Without dead ends: 335 [2018-10-02 11:43:41,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:43:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-10-02 11:43:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-10-02 11:43:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-02 11:43:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-10-02 11:43:41,714 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2018-10-02 11:43:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:41,714 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-10-02 11:43:41,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:43:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-10-02 11:43:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-02 11:43:41,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:41,716 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1] [2018-10-02 11:43:41,716 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:41,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times [2018-10-02 11:43:41,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:41,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:41,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:41,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:41,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-10-02 11:43:44,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:44,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:44,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:44,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:44,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:44,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-10-02 11:43:44,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:44,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 11:43:44,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 11:43:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 11:43:44,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:43:44,894 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states. [2018-10-02 11:43:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:45,736 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2018-10-02 11:43:45,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:43:45,736 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-10-02 11:43:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:45,737 INFO L225 Difference]: With dead ends: 507 [2018-10-02 11:43:45,738 INFO L226 Difference]: Without dead ends: 339 [2018-10-02 11:43:45,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:43:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-02 11:43:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-02 11:43:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-02 11:43:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-10-02 11:43:45,743 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-10-02 11:43:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:45,743 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-10-02 11:43:45,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 11:43:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-10-02 11:43:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-02 11:43:45,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:45,745 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-10-02 11:43:45,745 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:45,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times [2018-10-02 11:43:45,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:45,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:45,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:45,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:45,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-10-02 11:43:48,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:48,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:48,412 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:57,447 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-02 11:43:57,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:57,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-10-02 11:43:57,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:57,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:43:57,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:43:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:43:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:57,552 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states. [2018-10-02 11:43:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:58,579 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2018-10-02 11:43:58,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:43:58,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-10-02 11:43:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:58,581 INFO L225 Difference]: With dead ends: 513 [2018-10-02 11:43:58,581 INFO L226 Difference]: Without dead ends: 343 [2018-10-02 11:43:58,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:43:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-02 11:43:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-10-02 11:43:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-02 11:43:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-10-02 11:43:58,588 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-10-02 11:43:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:58,588 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-10-02 11:43:58,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:43:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-10-02 11:43:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-02 11:43:58,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:58,589 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1] [2018-10-02 11:43:58,589 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:58,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times [2018-10-02 11:43:58,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:58,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:58,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:58,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:58,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-10-02 11:44:01,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:01,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:01,647 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:06,423 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-02 11:44:06,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:06,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-10-02 11:44:06,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:06,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 11:44:06,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 11:44:06,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 11:44:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:44:06,567 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states. [2018-10-02 11:44:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:07,706 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2018-10-02 11:44:07,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:44:07,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-10-02 11:44:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:07,708 INFO L225 Difference]: With dead ends: 519 [2018-10-02 11:44:07,708 INFO L226 Difference]: Without dead ends: 347 [2018-10-02 11:44:07,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:44:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-02 11:44:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-10-02 11:44:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-02 11:44:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2018-10-02 11:44:07,714 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2018-10-02 11:44:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:07,714 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2018-10-02 11:44:07,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 11:44:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2018-10-02 11:44:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-02 11:44:07,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:07,716 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1] [2018-10-02 11:44:07,716 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:07,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:07,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times [2018-10-02 11:44:07,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:07,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:07,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:07,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:07,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-10-02 11:44:10,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:10,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:10,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:11,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-10-02 11:44:11,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:11,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:44:11,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:44:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:44:11,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:44:11,097 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states. [2018-10-02 11:44:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:11,989 INFO L93 Difference]: Finished difference Result 525 states and 528 transitions. [2018-10-02 11:44:11,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:44:11,989 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-10-02 11:44:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:11,992 INFO L225 Difference]: With dead ends: 525 [2018-10-02 11:44:11,992 INFO L226 Difference]: Without dead ends: 351 [2018-10-02 11:44:11,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:44:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-02 11:44:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-10-02 11:44:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-10-02 11:44:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-10-02 11:44:11,998 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2018-10-02 11:44:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:11,998 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-10-02 11:44:11,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:44:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-10-02 11:44:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-02 11:44:12,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:12,000 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1] [2018-10-02 11:44:12,000 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:12,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times [2018-10-02 11:44:12,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:12,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:12,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:12,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:12,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-10-02 11:44:15,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:15,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:15,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:15,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:15,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:15,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-10-02 11:44:15,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:15,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 11:44:15,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:44:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:44:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:44:15,413 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states. [2018-10-02 11:44:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:16,674 INFO L93 Difference]: Finished difference Result 531 states and 534 transitions. [2018-10-02 11:44:16,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:44:16,674 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-10-02 11:44:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:16,676 INFO L225 Difference]: With dead ends: 531 [2018-10-02 11:44:16,677 INFO L226 Difference]: Without dead ends: 355 [2018-10-02 11:44:16,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:44:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-02 11:44:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-10-02 11:44:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-02 11:44:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-10-02 11:44:16,682 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2018-10-02 11:44:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:16,682 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-10-02 11:44:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:44:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-10-02 11:44:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-02 11:44:16,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:16,684 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1] [2018-10-02 11:44:16,684 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:16,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times [2018-10-02 11:44:16,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:16,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:16,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:16,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-10-02 11:44:19,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:19,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:19,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:27,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-02 11:44:27,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:27,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-10-02 11:44:27,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:27,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:44:27,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:44:27,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:44:27,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:44:27,864 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states. Received shutdown request... [2018-10-02 11:44:28,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:44:28,526 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:44:28,531 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:44:28,531 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:44:28 BoogieIcfgContainer [2018-10-02 11:44:28,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:44:28,532 INFO L168 Benchmark]: Toolchain (without parser) took 246130.50 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -8.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 216.0 MB). Peak memory consumption was 207.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:28,533 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:28,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:28,534 INFO L168 Benchmark]: Boogie Preprocessor took 22.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:44:28,534 INFO L168 Benchmark]: RCFGBuilder took 319.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:28,535 INFO L168 Benchmark]: TraceAbstraction took 245736.53 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -8.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 194.9 MB). Peak memory consumption was 186.0 MB. Max. memory is 7.1 GB. [2018-10-02 11:44:28,537 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.17 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 22.61 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 319.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245736.53 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -8.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 194.9 MB). Peak memory consumption was 186.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 56). Cancelled while BasicCegarLoop was constructing difference of abstraction (355states) and FLOYD_HOARE automaton (currently 90 states, 90 states before enhancement), while ReachableStatesComputation was computing reachable states (386 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 245.6s OverallTime, 88 OverallIterations, 88 TraceHistogramMax, 38.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 526 SDtfs, 6964 SDslu, 9817 SDs, 0 SdLazy, 9994 SolverSat, 7215 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19751 GetRequests, 15835 SyntacticMatches, 0 SemanticMatches, 3916 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=355occurred in iteration=87, 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: 0.4s AutomataMinimizationTime, 87 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 85.3s SatisfiabilityAnalysisTime, 114.5s InterpolantComputationTime, 31674 NumberOfCodeBlocks, 31674 NumberOfCodeBlocksAsserted, 2125 NumberOfCheckSat, 31499 ConstructedInterpolants, 0 QuantifiedInterpolants, 14880931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47415 ConjunctsInSsa, 4002 ConjunctsInUnsatCore, 175 InterpolantComputations, 1 PerfectInterpolantSequences, 454256/908512 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/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-44-28-546.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-44-28-546.csv Completed graceful shutdown