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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:51:43,205 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:51:43,211 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:51:43,230 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:51:43,230 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:51:43,232 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:51:43,233 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:51:43,236 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:51:43,238 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:51:43,242 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:51:43,243 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:51:43,286 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:51:43,308 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:51:43,309 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:51:43,309 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:51:43,310 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:51:43,310 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:51:43,310 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:51:43,310 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:51:43,311 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:51:43,311 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:51:43,311 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:51:43,311 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:51:43,311 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:51:43,312 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:51:43,312 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:51:43,312 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:51:43,312 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:51:43,312 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:51:43,313 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:51:43,313 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:51:43,313 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:51:43,313 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:51:43,313 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:51:43,314 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:51:43,314 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:51:43,314 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:51:43,314 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:51:43,314 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:51:43,315 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:51:43,315 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:51:43,315 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:51:43,315 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:51:43,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:51:43,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:51:43,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:51:43,380 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:51:43,381 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:51:43,382 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-30 20:51:43,382 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-30 20:51:43,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:51:43,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:51:43,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:51:43,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:51:43,439 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:51:43,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,482 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:51:43,482 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:51:43,482 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:51:43,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:51:43,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:51:43,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:51:43,485 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:51:43,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... [2018-09-30 20:51:43,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:51:43,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:51:43,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:51:43,510 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:51:43,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:51:43,575 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:51:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:51:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:51:43,798 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:51:43,799 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:51:43 BoogieIcfgContainer [2018-09-30 20:51:43,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:51:43,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:51:43,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:51:43,804 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:51:43,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:51:43" (1/2) ... [2018-09-30 20:51:43,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8875e0 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:51:43, skipping insertion in model container [2018-09-30 20:51:43,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:51:43" (2/2) ... [2018-09-30 20:51:43,808 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-30 20:51:43,819 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:51:43,829 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:51:43,891 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:51:43,892 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:51:43,892 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:51:43,893 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:51:43,893 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:51:43,893 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:51:43,893 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:51:43,893 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:51:43,894 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:51:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:51:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:51:43,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:43,929 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:51:43,932 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:43,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 20:51:43,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:43,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:44,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:44,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:44,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:44,180 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:51:44,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:51:44,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:51:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:51:44,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:44,205 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:51:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:44,576 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:51:44,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:51:44,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:51:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:44,589 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:51:44,589 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:51:44,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:51:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:51:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:51:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:51:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:51:44,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 20:51:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:44,628 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:51:44,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:51:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:51:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:51:44,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:44,629 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:51:44,629 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:44,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 20:51:44,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:44,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:44,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:44,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:44,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:44,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:44,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:44,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:44,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 20:51:44,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:51:44,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:51:44,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:44,902 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 20:51:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:45,081 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:51:45,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:51:45,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 20:51:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:45,083 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:51:45,083 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:51:45,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:51:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:51:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:51:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:51:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:51:45,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 20:51:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:45,088 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:51:45,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:51:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:51:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:51:45,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:45,089 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 20:51:45,089 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:45,089 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 20:51:45,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:45,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:45,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:45,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:45,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:45,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:45,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:45,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:45,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:45,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:45,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:45,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 20:51:45,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:51:45,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:51:45,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:45,514 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 20:51:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:45,618 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:51:45,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:51:45,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 20:51:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:45,620 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:51:45,620 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:51:45,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:51:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:51:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:51:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:51:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:51:45,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 20:51:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:45,626 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:51:45,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:51:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:51:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:51:45,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:45,627 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 20:51:45,628 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:45,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 20:51:45,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:45,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:45,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:45,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:45,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:45,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:45,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:51:45,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:45,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:45,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:45,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 20:51:45,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:51:45,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:51:45,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:45,969 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 20:51:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:46,106 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:51:46,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:51:46,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 20:51:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:46,107 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:51:46,108 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:51:46,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:51:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:51:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:51:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:51:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:51:46,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 20:51:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:46,113 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:51:46,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:51:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:51:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:51:46,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:46,114 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 20:51:46,114 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:46,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 20:51:46,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:46,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:46,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:46,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:46,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:46,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:46,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:46,413 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:46,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:46,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:46,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:46,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 20:51:46,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:51:46,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:51:46,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:46,739 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 20:51:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:46,980 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:51:46,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:51:46,981 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 20:51:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:46,982 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:51:46,982 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:51:46,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:51:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:51:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:51:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:51:46,986 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 20:51:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:46,986 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:51:46,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:51:46,987 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:51:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:51:46,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:46,988 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 20:51:46,988 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:46,988 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 20:51:46,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:46,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:46,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:46,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:46,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:47,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:47,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:47,111 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:47,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:51:47,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:47,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:47,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:47,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 20:51:47,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:51:47,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:51:47,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:47,253 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 20:51:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:47,463 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:51:47,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:51:47,466 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:51:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:47,467 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:51:47,467 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:51:47,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:51:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:51:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:51:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:51:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:51:47,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 20:51:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:47,475 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:51:47,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:51:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:51:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:51:47,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:47,476 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 20:51:47,477 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:47,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 20:51:47,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:47,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:47,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:47,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:47,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:47,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:47,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:47,613 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:47,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:51:47,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:47,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:47,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:47,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 20:51:47,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:51:47,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:51:47,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:47,942 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 20:51:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:48,057 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:51:48,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:51:48,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 20:51:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:48,059 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:51:48,060 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:51:48,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:51:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:51:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:51:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:51:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:51:48,064 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 20:51:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:48,065 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:51:48,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:51:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:51:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:51:48,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:48,066 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 20:51:48,066 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:48,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 20:51:48,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:48,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:48,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:48,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:48,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:48,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:48,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:48,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:48,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:48,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:48,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 20:51:48,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:51:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:51:48,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:48,365 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 20:51:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:48,518 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:51:48,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:51:48,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 20:51:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:48,519 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:51:48,520 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:51:48,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:51:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:51:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:51:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:51:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:51:48,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 20:51:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:48,525 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:51:48,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:51:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:51:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:51:48,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:48,526 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 20:51:48,526 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:48,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 20:51:48,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:48,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:48,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:48,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:48,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:48,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:48,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:48,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:48,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:48,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:48,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:48,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:48,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 20:51:48,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:51:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:51:48,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:48,821 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 20:51:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:49,001 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:51:49,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:51:49,002 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 20:51:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:49,003 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:51:49,004 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:51:49,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:51:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:51:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:51:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:51:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:51:49,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 20:51:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:49,009 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:51:49,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:51:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:51:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:51:49,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:49,010 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 20:51:49,011 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:49,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 20:51:49,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:49,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:49,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:49,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:49,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:49,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:49,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:49,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:49,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:51:49,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:49,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:49,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:49,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 20:51:49,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:51:49,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:51:49,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:49,366 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 20:51:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:49,699 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:51:49,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:51:49,700 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 20:51:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:49,701 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:51:49,701 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:51:49,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:51:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:51:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:51:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:51:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:51:49,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 20:51:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:49,707 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:51:49,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:51:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:51:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:51:49,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:49,708 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 20:51:49,709 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:49,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:49,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 20:51:49,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:49,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:49,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:49,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:49,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:49,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:49,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:49,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:49,851 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:49,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:49,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:50,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:50,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 20:51:50,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:51:50,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:51:50,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:50,285 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 20:51:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:50,532 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:51:50,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:51:50,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 20:51:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:50,534 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:51:50,534 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:51:50,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:51:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:51:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:51:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:51:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:51:50,541 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 20:51:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:50,541 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:51:50,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:51:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:51:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:51:50,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:50,542 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 20:51:50,543 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:50,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:50,543 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 20:51:50,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:50,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:50,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:50,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:50,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:50,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:50,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:50,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:50,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:51:50,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:50,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:51,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:51,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 20:51:51,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:51:51,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:51:51,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:51,319 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 20:51:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:51,558 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:51:51,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:51:51,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 20:51:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:51,559 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:51:51,560 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:51:51,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:51:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:51:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:51:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:51:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:51:51,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 20:51:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:51,566 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:51:51,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:51:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:51:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:51:51,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:51,567 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 20:51:51,567 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:51,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 20:51:51,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:51,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:51,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:51,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:51,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:51,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:51,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:51,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:51,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:51:51,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:51,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:52,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:52,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 20:51:52,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:51:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:51:52,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:52,017 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 20:51:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:52,208 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:51:52,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:51:52,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 20:51:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:52,210 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:51:52,210 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:51:52,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:51:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:51:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:51:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:51:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:51:52,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 20:51:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:52,216 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:51:52,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:51:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:51:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:51:52,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:52,217 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 20:51:52,217 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:52,218 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 20:51:52,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:52,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:52,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:52,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:52,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:52,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:52,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:52,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:52,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:52,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:52,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 20:51:52,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:51:52,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:51:52,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:52,759 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 20:51:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:53,143 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:51:53,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:51:53,143 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 20:51:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:53,144 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:51:53,144 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:51:53,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:51:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:51:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:51:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:51:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:51:53,151 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 20:51:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:53,152 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:51:53,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:51:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:51:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:51:53,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:53,153 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 20:51:53,153 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:53,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 20:51:53,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:53,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:53,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:53,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:53,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:53,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:53,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:53,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:53,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:53,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:53,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:53,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:53,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 20:51:53,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:51:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:51:53,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:53,634 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 20:51:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:53,956 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:51:53,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:51:53,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 20:51:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:53,957 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:51:53,957 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:51:53,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:51:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:51:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:51:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:51:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:51:53,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 20:51:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:53,963 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:51:53,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:51:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:51:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:51:53,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:53,964 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 20:51:53,964 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:53,964 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:53,964 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 20:51:53,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:53,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:53,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:53,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:53,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:54,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:54,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:54,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:54,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:51:54,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:54,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:55,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:55,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 20:51:55,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:51:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:51:55,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:55,047 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 20:51:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:55,296 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:51:55,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:51:55,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 20:51:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:55,297 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:51:55,297 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:51:55,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:51:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:51:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:51:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:51:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:51:55,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 20:51:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:55,303 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:51:55,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:51:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:51:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:51:55,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:55,304 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 20:51:55,304 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:55,304 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 20:51:55,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:55,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:55,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:55,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:55,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:55,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:55,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:55,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:55,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:55,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:55,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:55,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:55,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 20:51:55,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:51:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:51:55,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:55,696 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 20:51:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:56,007 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:51:56,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:51:56,008 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 20:51:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:56,009 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:51:56,009 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:51:56,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:51:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:51:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:51:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:51:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:51:56,014 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 20:51:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:56,014 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:51:56,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:51:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:51:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:51:56,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:56,015 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 20:51:56,015 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:56,015 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:56,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 20:51:56,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:56,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:56,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:56,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:56,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:56,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:56,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:56,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:56,421 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:51:56,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:56,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:56,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:56,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 20:51:56,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:51:56,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:51:56,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:56,770 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 20:51:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:57,096 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:51:57,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:51:57,096 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 20:51:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:57,097 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:51:57,097 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:51:57,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:51:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:51:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:51:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:51:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:51:57,104 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 20:51:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:57,104 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:51:57,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:51:57,105 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:51:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:51:57,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:57,106 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 20:51:57,106 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:57,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 20:51:57,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:57,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:57,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:57,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:57,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:57,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:57,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:57,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:57,620 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:51:57,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:57,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:58,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:58,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 20:51:58,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:51:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:51:58,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:58,058 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 20:51:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:58,371 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:51:58,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:51:58,371 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 20:51:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:58,372 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:51:58,373 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:51:58,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:51:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:51:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:51:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:51:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:51:58,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 20:51:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:58,377 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:51:58,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:51:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:51:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:51:58,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:58,378 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 20:51:58,379 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:58,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 20:51:58,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:58,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:58,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:58,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:58,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:58,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:58,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:58,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:58,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:58,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 20:51:58,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:51:58,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:51:58,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:58,973 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 20:51:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:59,299 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:51:59,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:51:59,300 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 20:51:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:59,301 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:51:59,301 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:51:59,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:51:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:51:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:51:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:51:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:51:59,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 20:51:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:59,307 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:51:59,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:51:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:51:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:51:59,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:59,308 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 20:51:59,308 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:59,309 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 20:51:59,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:59,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:59,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:59,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:59,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:59,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:59,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:59,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:59,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:59,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:59,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:59,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:59,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 20:51:59,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:51:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:51:59,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:59,983 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 20:52:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:00,358 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:52:00,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:52:00,359 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 20:52:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:00,359 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:52:00,360 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:52:00,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:52:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:52:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:52:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:52:00,366 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 20:52:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:00,366 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:52:00,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:52:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:52:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:52:00,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:00,367 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 20:52:00,367 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:00,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 20:52:00,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:00,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:00,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:00,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:00,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:01,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:01,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:01,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:01,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:52:01,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:01,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:01,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:01,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 20:52:01,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:52:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:52:01,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:01,508 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 20:52:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:01,931 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:52:01,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:52:01,933 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 20:52:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:01,934 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:52:01,935 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:52:01,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:52:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:52:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:52:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:52:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:52:01,939 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 20:52:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:01,940 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:52:01,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:52:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:52:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:52:01,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:01,941 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 20:52:01,941 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:01,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:01,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 20:52:01,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:01,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:01,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:01,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:01,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:02,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:02,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:02,124 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:02,138 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:02,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:02,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:02,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:02,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 20:52:02,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:52:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:52:02,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:02,441 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 20:52:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:02,776 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:52:02,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:52:02,776 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 20:52:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:02,777 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:52:02,777 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:52:02,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:52:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:52:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:52:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:52:02,783 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 20:52:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:02,784 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:52:02,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:52:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:52:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:52:02,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:02,785 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 20:52:02,785 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:02,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 20:52:02,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:02,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:02,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:02,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:03,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:03,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:03,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:03,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:52:03,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:03,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:03,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:03,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 20:52:03,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:52:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:52:03,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:03,370 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 20:52:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:03,716 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:52:03,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:52:03,717 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 20:52:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:03,718 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:52:03,718 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:52:03,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:52:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:52:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:52:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:52:03,724 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 20:52:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:03,724 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:52:03,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:52:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:52:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:52:03,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:03,725 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 20:52:03,726 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:03,726 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 20:52:03,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:03,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:03,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:03,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:03,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:04,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:04,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:04,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:04,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:52:04,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:04,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:04,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:04,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 20:52:04,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:52:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:52:04,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:04,503 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 20:52:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:04,827 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:52:04,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:52:04,827 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 20:52:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:04,828 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:52:04,828 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:52:04,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:52:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:52:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:52:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:52:04,831 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 20:52:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:04,832 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:52:04,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:52:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:52:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:52:04,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:04,833 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 20:52:04,833 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:04,833 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 20:52:04,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:04,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:04,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:04,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:04,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:05,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:05,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:05,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:05,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:05,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:05,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 20:52:05,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:52:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:52:05,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:05,318 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 20:52:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:05,667 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:52:05,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:52:05,667 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 20:52:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:05,668 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:52:05,669 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:52:05,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:52:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:52:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:52:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:52:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:52:05,674 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 20:52:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:05,674 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:52:05,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:52:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:52:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:52:05,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:05,675 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 20:52:05,675 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:05,676 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 20:52:05,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:05,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:05,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:05,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:05,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:05,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:05,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:05,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:05,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:05,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:05,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:06,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:06,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 20:52:06,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:52:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:52:06,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:06,266 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 20:52:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:06,859 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:52:06,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:52:06,859 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 20:52:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:06,860 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:52:06,860 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:52:06,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:52:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:52:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:52:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:52:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:52:06,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 20:52:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:06,865 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:52:06,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:52:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:52:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:52:06,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:06,866 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 20:52:06,866 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:06,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:06,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 20:52:06,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:06,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:06,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:06,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:06,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:07,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:07,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:07,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:07,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:52:07,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:07,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:07,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:07,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 20:52:07,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:52:07,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:52:07,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:07,512 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 20:52:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:07,810 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:52:07,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:52:07,811 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 20:52:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:07,812 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:52:07,812 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:52:07,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:52:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:52:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:52:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:52:07,817 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 20:52:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:07,817 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:52:07,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:52:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:52:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:52:07,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:07,818 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 20:52:07,818 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:07,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:07,819 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 20:52:07,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:07,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:07,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:07,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:07,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:08,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:08,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:08,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:08,040 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:08,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:08,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:09,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:09,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 20:52:09,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:52:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:52:09,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:09,054 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 20:52:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:09,723 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:52:09,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:52:09,724 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 20:52:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:09,725 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:52:09,725 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:52:09,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:52:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:52:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:52:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:52:09,730 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 20:52:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:09,730 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:52:09,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:52:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:52:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:52:09,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:09,731 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 20:52:09,731 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:09,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 20:52:09,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:09,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:09,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:09,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:09,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:09,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:09,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:10,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:10,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:52:10,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:10,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:10,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:10,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 20:52:10,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:52:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:52:10,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:10,390 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 20:52:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:10,935 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:52:10,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:52:10,935 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 20:52:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:10,936 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:52:10,936 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:52:10,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:52:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:52:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:52:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:52:10,939 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 20:52:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:10,940 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:52:10,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:52:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:52:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:52:10,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:10,940 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 20:52:10,940 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:10,940 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 20:52:10,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:10,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:10,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:10,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:10,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:11,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:11,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:11,175 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:11,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:52:11,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:11,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:11,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:11,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 20:52:11,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:52:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:52:11,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:11,573 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 20:52:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:12,122 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:52:12,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:52:12,123 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 20:52:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:12,124 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:52:12,124 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:52:12,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:52:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:52:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:52:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:52:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:52:12,127 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 20:52:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:12,128 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:52:12,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:52:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:52:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:52:12,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:12,129 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 20:52:12,129 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:12,129 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 20:52:12,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:12,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:12,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:12,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:12,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:12,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:12,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:12,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:12,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:13,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:13,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 20:52:13,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:52:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:52:13,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:13,024 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 20:52:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:13,451 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:52:13,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:52:13,451 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 20:52:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:13,452 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:52:13,452 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:52:13,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:52:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:52:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:52:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:52:13,455 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 20:52:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:13,456 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:52:13,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:52:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:52:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:52:13,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:13,456 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 20:52:13,456 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:13,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 20:52:13,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:13,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:13,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:13,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:13,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:13,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:13,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:13,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:13,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:13,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:13,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:14,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:14,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 20:52:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:52:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:52:14,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:14,244 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 20:52:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:14,718 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:52:14,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:52:14,719 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 20:52:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:14,720 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:52:14,720 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:52:14,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:52:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:52:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:52:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:52:14,725 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 20:52:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:14,725 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:52:14,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:52:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:52:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:52:14,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:14,726 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 20:52:14,726 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:14,726 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 20:52:14,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:14,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:14,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:14,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:14,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:15,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:15,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:15,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:15,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:52:15,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:15,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:15,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:15,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 20:52:15,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:52:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:52:15,637 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:15,637 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 20:52:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:16,167 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:52:16,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:52:16,167 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 20:52:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:16,168 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:52:16,168 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:52:16,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:52:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:52:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:52:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:52:16,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 20:52:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:16,171 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:52:16,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:52:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:52:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:52:16,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:16,171 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 20:52:16,171 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:16,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 20:52:16,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:16,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:16,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:16,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:16,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:16,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:16,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:16,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:16,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:16,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:17,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:17,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 20:52:17,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:52:17,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:52:17,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:17,028 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 20:52:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:17,469 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:52:17,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:52:17,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 20:52:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:17,470 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:52:17,470 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:52:17,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:52:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:52:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:52:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:52:17,473 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 20:52:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:17,474 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:52:17,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:52:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:52:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:52:17,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:17,474 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 20:52:17,475 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:17,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 20:52:17,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:17,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:17,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:17,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:17,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:18,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:18,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:18,112 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:18,145 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:52:18,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:18,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:18,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:18,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 20:52:18,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:52:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:52:18,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:18,590 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 20:52:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:19,435 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:52:19,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:52:19,435 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 20:52:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:19,436 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:52:19,436 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:52:19,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:52:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:52:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:52:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:52:19,439 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 20:52:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:19,440 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:52:19,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:52:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:52:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:52:19,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:19,440 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 20:52:19,441 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:19,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 20:52:19,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:19,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:19,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:19,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:19,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:19,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:19,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:19,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:19,817 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:52:19,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:19,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:20,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:20,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 20:52:20,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:52:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:52:20,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:20,304 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 20:52:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:20,746 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:52:20,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:52:20,747 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 20:52:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:20,748 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:52:20,748 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:52:20,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:52:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:52:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:52:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:52:20,751 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 20:52:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:20,752 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:52:20,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:52:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:52:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:52:20,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:20,753 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 20:52:20,753 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:20,753 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 20:52:20,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:20,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:20,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:20,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:20,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:21,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:21,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:21,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:21,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:21,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:21,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 20:52:21,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:52:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:52:21,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:21,789 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 20:52:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:22,602 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:52:22,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:52:22,603 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 20:52:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:22,604 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:52:22,604 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:52:22,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:52:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:52:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:52:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:52:22,608 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 20:52:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:22,608 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:52:22,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:52:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:52:22,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:52:22,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:22,609 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 20:52:22,609 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:22,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 20:52:22,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:22,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:22,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:22,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:22,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:22,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:22,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:22,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:23,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 20:52:23,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:52:23,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:52:23,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:23,413 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 20:52:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:24,020 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:52:24,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:52:24,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 20:52:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:24,021 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:52:24,022 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:52:24,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:52:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:52:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:52:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:52:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:52:24,026 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 20:52:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:24,026 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:52:24,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:52:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:52:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:52:24,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:24,027 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 20:52:24,027 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:24,027 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:24,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 20:52:24,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:24,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:24,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:24,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:24,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:24,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:24,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:52:24,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:24,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:25,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:25,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 20:52:25,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:52:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:52:25,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:25,124 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 20:52:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:25,732 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:52:25,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:52:25,733 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 20:52:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:25,733 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:52:25,733 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:52:25,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:52:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:52:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:52:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:52:25,736 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 20:52:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:25,737 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:52:25,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:52:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:52:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:52:25,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:25,737 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 20:52:25,738 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:25,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 20:52:25,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:25,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:25,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:25,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:26,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:26,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:26,059 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:26,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:26,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:26,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 20:52:26,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:52:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:52:26,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:26,600 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 20:52:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:27,482 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:52:27,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:52:27,483 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 20:52:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:27,483 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:52:27,483 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:52:27,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:52:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:52:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:52:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:52:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:52:27,488 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 20:52:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:27,488 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:52:27,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:52:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:52:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:52:27,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:27,489 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 20:52:27,489 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:27,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 20:52:27,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:27,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:27,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:27,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:27,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:28,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:28,225 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:28,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:52:28,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:28,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:28,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 20:52:28,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:52:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:52:28,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:28,862 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 20:52:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:29,408 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:52:29,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:52:29,409 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 20:52:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:29,410 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:52:29,410 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:52:29,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:52:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:52:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:52:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:52:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:52:29,415 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 20:52:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:29,416 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:52:29,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:52:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:52:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:52:29,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:29,416 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 20:52:29,417 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:29,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:29,417 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 20:52:29,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:29,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:29,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:29,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:29,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:29,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:29,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:29,853 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:52:29,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:29,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:30,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:30,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 20:52:30,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:52:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:52:30,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:30,525 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 20:52:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:31,102 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:52:31,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:52:31,102 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 20:52:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:31,103 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:52:31,103 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:52:31,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:52:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:52:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:52:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:52:31,106 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 20:52:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:31,107 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:52:31,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:52:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:52:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:52:31,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:31,107 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 20:52:31,108 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:31,108 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 20:52:31,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:31,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:31,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:31,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:32,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:32,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:32,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:32,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:33,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:33,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 20:52:33,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:52:33,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:52:33,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:33,082 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 20:52:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:33,682 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:52:33,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:52:33,682 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 20:52:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:33,683 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:52:33,683 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:52:33,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:52:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:52:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:52:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:52:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:52:33,686 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 20:52:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:33,687 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:52:33,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:52:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:52:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:52:33,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:33,688 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 20:52:33,688 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:33,688 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 20:52:33,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:33,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:33,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:33,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:34,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:34,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:34,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:34,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:34,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:34,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 20:52:34,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:52:34,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:52:34,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:34,679 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 20:52:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:35,381 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:52:35,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:52:35,381 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 20:52:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:35,382 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:52:35,382 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:52:35,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:52:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:52:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:52:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:52:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:52:35,386 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 20:52:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:35,387 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:52:35,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:52:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:52:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:52:35,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:35,388 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 20:52:35,388 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:35,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 20:52:35,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:35,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:35,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:35,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:35,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:35,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:35,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:35,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:35,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:52:35,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:35,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:36,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:36,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 20:52:36,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:52:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:52:36,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:36,544 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 20:52:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:37,107 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:52:37,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:52:37,107 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 20:52:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:37,108 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:52:37,108 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:52:37,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:52:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:52:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:52:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:52:37,113 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 20:52:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:37,113 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:52:37,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:52:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:52:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:52:37,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:37,114 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 20:52:37,114 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:37,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 20:52:37,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:37,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:37,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:37,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:37,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:37,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:37,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:37,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:37,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:37,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:38,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 20:52:38,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:52:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:52:38,455 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:38,455 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 20:52:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:39,035 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:52:39,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:52:39,035 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 20:52:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:39,036 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:52:39,036 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:52:39,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:52:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:52:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:52:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:52:39,039 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 20:52:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:39,040 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:52:39,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:52:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:52:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:52:39,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:39,040 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 20:52:39,041 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:39,041 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 20:52:39,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:39,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:39,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:39,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:39,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:39,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:39,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:39,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:52:39,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:39,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:40,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:40,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 20:52:40,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:52:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:52:40,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:40,713 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 20:52:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:41,355 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:52:41,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:52:41,355 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 20:52:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:41,356 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:52:41,356 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:52:41,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:52:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:52:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:52:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:52:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:52:41,360 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 20:52:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:41,361 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:52:41,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:52:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:52:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:52:41,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:41,361 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 20:52:41,362 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:41,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 20:52:41,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:41,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:41,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:41,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:41,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:41,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:41,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:52:41,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:41,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:42,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:42,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 20:52:42,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:52:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:52:42,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:42,658 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 20:52:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:43,311 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:52:43,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:52:43,312 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 20:52:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:43,313 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:52:43,313 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:52:43,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:52:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:52:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:52:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:52:43,317 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 20:52:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:43,317 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:52:43,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:52:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:52:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:52:43,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:43,318 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 20:52:43,318 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:43,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 20:52:43,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:43,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:43,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:43,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:43,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:43,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:43,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:43,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:43,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:45,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 20:52:45,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:52:45,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:52:45,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:45,327 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 20:52:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:45,922 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:52:45,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:52:45,923 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 20:52:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:45,924 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:52:45,924 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:52:45,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:52:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:52:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:52:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:52:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:52:45,929 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 20:52:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:45,929 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:52:45,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:52:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:52:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:52:45,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:45,930 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 20:52:45,931 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:45,931 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 20:52:45,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:45,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:45,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:45,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:45,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:46,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:46,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:46,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:46,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:46,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:46,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:47,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:47,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 20:52:47,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:52:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:52:47,076 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:47,076 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 20:52:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:48,386 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:52:48,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:52:48,386 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 20:52:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:48,387 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:52:48,387 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:52:48,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:52:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:52:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:52:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:52:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:52:48,393 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 20:52:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:48,393 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:52:48,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:52:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:52:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:52:48,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:48,394 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 20:52:48,395 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:48,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 20:52:48,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:48,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:48,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:48,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:49,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:49,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:49,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:52:49,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:49,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:50,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:50,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 20:52:50,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:52:50,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:52:50,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:50,063 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 20:52:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:50,825 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:52:50,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:52:50,826 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 20:52:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:50,827 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:52:50,827 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:52:50,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:52:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:52:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:52:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:52:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:52:50,832 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 20:52:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:50,832 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:52:50,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:52:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:52:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:52:50,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:50,833 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 20:52:50,833 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:50,833 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:50,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 20:52:50,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:50,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:50,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:50,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:51,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:51,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:51,449 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:51,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:51,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:53,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:53,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 20:52:53,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:52:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:52:53,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:53,113 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 20:52:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:54,043 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:52:54,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:52:54,043 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 20:52:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:54,044 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:52:54,044 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:52:54,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:52:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:52:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:52:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:52:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:52:54,047 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 20:52:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:54,048 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:52:54,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:52:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:52:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:52:54,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:54,049 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 20:52:54,049 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:54,049 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 20:52:54,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:54,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:54,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:54,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:54,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:54,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:54,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:54,552 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:52:54,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:54,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:55,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 20:52:55,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:52:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:52:55,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:55,473 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 20:52:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:56,141 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:52:56,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:52:56,141 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 20:52:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:56,142 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:52:56,142 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:52:56,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:52:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:52:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:52:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:52:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:52:56,145 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 20:52:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:56,146 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:52:56,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:52:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:52:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:52:56,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:56,146 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 20:52:56,147 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:56,147 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 20:52:56,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:56,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:56,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:56,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:56,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:56,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:56,992 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:57,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:52:57,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:57,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:58,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 20:52:58,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:52:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:52:58,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,169 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 20:53:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:00,179 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:53:00,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:53:00,179 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 20:53:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:00,180 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:53:00,180 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:53:00,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:53:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:53:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:53:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:53:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:53:00,186 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 20:53:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:00,186 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:53:00,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:53:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:53:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:53:00,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:00,187 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 20:53:00,188 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:00,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 20:53:00,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:00,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:00,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:00,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:00,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:00,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:00,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:00,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:01,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:01,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 20:53:01,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:53:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:53:01,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:01,337 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 20:53:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:02,025 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:53:02,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:53:02,026 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 20:53:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:02,027 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:53:02,027 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:53:02,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:53:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:53:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:53:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:53:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:53:02,032 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 20:53:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:02,032 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:53:02,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:53:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:53:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:53:02,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:02,033 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 20:53:02,033 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:02,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 20:53:02,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:02,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:02,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:02,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:02,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:02,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:02,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:02,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:02,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:02,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:02,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:03,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:03,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 20:53:03,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:53:03,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:53:03,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:03,467 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 20:53:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:04,448 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:53:04,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:53:04,448 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 20:53:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:04,449 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:53:04,449 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:53:04,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:53:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:53:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:53:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:53:04,452 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 20:53:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:04,453 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:53:04,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:53:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:53:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:53:04,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:04,454 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 20:53:04,454 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:04,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 20:53:04,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:04,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:05,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:05,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:05,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:05,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:53:05,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:05,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:06,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:06,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 20:53:06,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:53:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:53:06,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:06,058 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 20:53:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:06,828 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:53:06,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:53:06,828 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 20:53:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:06,829 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:53:06,829 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:53:06,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:53:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:53:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:53:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:53:06,834 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 20:53:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:06,834 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:53:06,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:53:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:53:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:53:06,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:06,835 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 20:53:06,835 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:06,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 20:53:06,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:06,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:06,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:06,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:06,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:07,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:07,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:07,206 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:07,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:07,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:07,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:08,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:08,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 20:53:08,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:53:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:53:08,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:08,267 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 20:53:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:09,027 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:53:09,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:53:09,028 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 20:53:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:09,028 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:53:09,028 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:53:09,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:53:09,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:53:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:53:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:53:09,032 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 20:53:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:09,032 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:53:09,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:53:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:53:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:53:09,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:09,033 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 20:53:09,033 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:09,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 20:53:09,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:09,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:09,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:09,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:09,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:09,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:09,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:09,592 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:09,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:53:09,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:09,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:10,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:10,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 20:53:10,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:53:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:53:10,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:10,622 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 20:53:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:11,635 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:53:11,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:53:11,635 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 20:53:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:11,636 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:53:11,636 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:53:11,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:53:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:53:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:53:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:53:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:53:11,641 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 20:53:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:11,641 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:53:11,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:53:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:53:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:53:11,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:11,642 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 20:53:11,642 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:11,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 20:53:11,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:11,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:11,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:11,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:11,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:12,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:12,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:12,825 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:12,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:53:12,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:12,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:13,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:13,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 20:53:13,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:53:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:53:13,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:13,929 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 20:53:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:14,886 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:53:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:53:14,886 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 20:53:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:14,887 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:53:14,887 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:53:14,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:53:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:53:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:53:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:53:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:53:14,891 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 20:53:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:14,891 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:53:14,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:53:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:53:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:53:14,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:14,892 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 20:53:14,892 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:14,892 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 20:53:14,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:14,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:14,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:14,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:14,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:15,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:15,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:15,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:15,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:16,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:16,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 20:53:16,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:53:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:53:16,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:16,221 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 20:53:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:17,177 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:53:17,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:53:17,178 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 20:53:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:17,178 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:53:17,179 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:53:17,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:53:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:53:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:53:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:53:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:53:17,182 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 20:53:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:17,183 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:53:17,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:53:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:53:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:53:17,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:17,183 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 20:53:17,184 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:17,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 20:53:17,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:17,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:17,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:17,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:17,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:17,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:17,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:17,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:17,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:17,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:18,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:18,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 20:53:18,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:53:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:53:18,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:18,797 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 20:53:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:19,692 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:53:19,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:53:19,692 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 20:53:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:19,693 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:53:19,693 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:53:19,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:53:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:53:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:53:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:53:19,697 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 20:53:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:19,698 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:53:19,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:53:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:53:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:53:19,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:19,699 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 20:53:19,699 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:19,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 20:53:19,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:19,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:19,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:19,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:19,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:20,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:20,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:20,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:20,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:53:20,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:20,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:21,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:21,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 20:53:21,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:53:21,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:53:21,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:21,082 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 20:53:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:21,979 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:53:21,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:53:21,979 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 20:53:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:21,980 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:53:21,980 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:53:21,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:53:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:53:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:53:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:53:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:53:21,984 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 20:53:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:21,984 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:53:21,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:53:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:53:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:53:21,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:21,985 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 20:53:21,985 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:21,986 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 20:53:21,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:21,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:21,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:21,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:21,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:22,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:22,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:22,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:22,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:22,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:22,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:23,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:23,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 20:53:23,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:53:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:53:23,455 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:23,455 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 20:53:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:24,534 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:53:24,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:53:24,534 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 20:53:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:24,535 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:53:24,535 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:53:24,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:53:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:53:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:53:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:53:24,540 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 20:53:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:24,541 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:53:24,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:53:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:53:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:53:24,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:24,542 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 20:53:24,542 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:24,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 20:53:24,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:24,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:24,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:24,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:24,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:25,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:25,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:25,052 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:25,129 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:53:25,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:25,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:26,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:26,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 20:53:26,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:53:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:53:26,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:26,898 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 20:53:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:27,927 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:53:27,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:53:27,927 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 20:53:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:27,928 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:53:27,928 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:53:27,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:53:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:53:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:53:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:53:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:53:27,931 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 20:53:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:27,931 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:53:27,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:53:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:53:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:53:27,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:27,932 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 20:53:27,932 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:27,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 20:53:27,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:27,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:27,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:27,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:27,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:28,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:28,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:28,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:28,655 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:53:28,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:28,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:29,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:29,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 20:53:29,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:53:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:53:29,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:29,696 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 20:53:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:30,797 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:53:30,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:53:30,797 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 20:53:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:30,798 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:53:30,798 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:53:30,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:53:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:53:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:53:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:53:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:53:30,802 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 20:53:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:30,803 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:53:30,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:53:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:53:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:53:30,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:30,804 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 20:53:30,804 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:30,804 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 20:53:30,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:30,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:30,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:30,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:30,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:31,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:31,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:31,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:31,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:32,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:32,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 20:53:32,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:53:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:53:32,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:32,244 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 20:53:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:33,164 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:53:33,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:53:33,164 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 20:53:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:33,165 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:53:33,165 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:53:33,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:53:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:53:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:53:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:53:33,169 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 20:53:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:33,169 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:53:33,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:53:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:53:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:53:33,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:33,170 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 20:53:33,171 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:33,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 20:53:33,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:33,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:33,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:33,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:33,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:33,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:33,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:33,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:33,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:33,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:33,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:34,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:34,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 20:53:34,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:53:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:53:34,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:34,622 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 20:53:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:35,609 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:53:35,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:53:35,610 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 20:53:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:35,610 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:53:35,610 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:53:35,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:53:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:53:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:53:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:53:35,614 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 20:53:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:35,615 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:53:35,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:53:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:53:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:53:35,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:35,616 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 20:53:35,616 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:35,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 20:53:35,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:35,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:35,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:35,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:35,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:36,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:36,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:36,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:36,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:53:36,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:36,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:37,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:37,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 20:53:37,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:53:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:53:37,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:37,095 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 20:53:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:38,221 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:53:38,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:53:38,221 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 20:53:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:38,222 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:53:38,222 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:53:38,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:53:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:53:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:53:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:53:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:53:38,226 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 20:53:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:38,226 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:53:38,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:53:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:53:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:53:38,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:38,227 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 20:53:38,227 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:38,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 20:53:38,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:38,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:38,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:38,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:38,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:38,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:38,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:38,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:38,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:38,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:38,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:40,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:40,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 20:53:40,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:53:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:53:40,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:40,090 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 20:53:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:41,000 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:53:41,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:53:41,000 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 20:53:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:41,001 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:53:41,001 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:53:41,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:53:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:53:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:53:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:53:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:53:41,005 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 20:53:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:41,005 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:53:41,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:53:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:53:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:53:41,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:41,006 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 20:53:41,006 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:41,006 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 20:53:41,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:41,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:41,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:41,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:41,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:41,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:41,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:41,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:41,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:53:41,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:41,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:42,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:42,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 20:53:42,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:53:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:53:42,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:42,951 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 20:53:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:44,091 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:53:44,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:53:44,092 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 20:53:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:44,093 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:53:44,093 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:53:44,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:53:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:53:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:53:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:53:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:53:44,097 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 20:53:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:44,098 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:53:44,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:53:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:53:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:53:44,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:44,099 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 20:53:44,099 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:44,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:44,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 20:53:44,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:44,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:44,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:44,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:44,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:44,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:44,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:44,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:44,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:53:44,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:44,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:45,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:45,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 20:53:45,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:53:45,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:53:45,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:45,761 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 20:53:46,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:46,777 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:53:46,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:53:46,777 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 20:53:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:46,778 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:53:46,778 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:53:46,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:53:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:53:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:53:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:53:46,783 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 20:53:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:46,783 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:53:46,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:53:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:53:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:53:46,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:46,784 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 20:53:46,785 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:46,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 20:53:46,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:46,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:46,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:46,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:46,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:47,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:47,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:47,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:47,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:48,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:48,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 20:53:48,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:53:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:53:48,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:48,422 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 20:53:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:49,702 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:53:49,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:53:49,702 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 20:53:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:49,703 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:53:49,703 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:53:49,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:53:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:53:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:53:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:53:49,707 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 20:53:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:49,707 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:53:49,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:53:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:53:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:53:49,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:49,709 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 20:53:49,709 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:49,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:49,709 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 20:53:49,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:49,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:49,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:49,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:49,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:50,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:50,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:50,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:50,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:50,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:50,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:51,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:51,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 20:53:51,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:53:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:53:51,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:51,366 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 20:53:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:52,418 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:53:52,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:53:52,419 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 20:53:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:52,419 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:53:52,419 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:53:52,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:53:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:53:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:53:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:53:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 20:53:52,423 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 20:53:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:52,423 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 20:53:52,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 20:53:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 20:53:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:53:52,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:52,424 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 20:53:52,425 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:52,425 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 20:53:52,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:52,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:52,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:52,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:52,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:52,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:52,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:52,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:52,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:53:52,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:52,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:54,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:54,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 20:53:54,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 20:53:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 20:53:54,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:54,055 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 20:53:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:55,115 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:53:55,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:53:55,116 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 20:53:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:55,116 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:53:55,116 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:53:55,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:53:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:53:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:53:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:53:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 20:53:55,120 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 20:53:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:55,120 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 20:53:55,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 20:53:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 20:53:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:53:55,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:55,121 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 20:53:55,121 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:55,121 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:55,121 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 20:53:55,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:55,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:55,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:55,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:55,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:55,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:55,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:55,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:55,654 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:55,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:55,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:56,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:56,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 20:53:56,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 20:53:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 20:53:56,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:56,710 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 20:53:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:57,816 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:53:57,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:53:57,817 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 20:53:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:57,818 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:53:57,818 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:53:57,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:53:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:53:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:53:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:53:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 20:53:57,821 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 20:53:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:57,821 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 20:53:57,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 20:53:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 20:53:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:53:57,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:57,822 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 20:53:57,822 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:57,822 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 20:53:57,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:57,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:57,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:57,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:57,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:58,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:58,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:58,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:58,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:53:58,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:58,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:59,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:59,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 20:53:59,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 20:53:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 20:53:59,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:59,590 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 20:54:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:00,921 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:54:00,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:54:00,922 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 20:54:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:00,922 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:54:00,922 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:54:00,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:54:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:54:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:54:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:54:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 20:54:00,928 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 20:54:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:00,928 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 20:54:00,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 20:54:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 20:54:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:54:00,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:00,929 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 20:54:00,929 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:00,929 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 20:54:00,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:00,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:00,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:00,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:00,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:01,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:01,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:01,425 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:01,514 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:54:01,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:01,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:02,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:02,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 20:54:02,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 20:54:02,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 20:54:02,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:02,695 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 20:54:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:04,015 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:54:04,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:54:04,015 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 20:54:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:04,016 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:54:04,016 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:54:04,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:54:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:54:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 20:54:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 20:54:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 20:54:04,021 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 20:54:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:04,021 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 20:54:04,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 20:54:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 20:54:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:54:04,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:04,023 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 20:54:04,023 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:04,023 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 20:54:04,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:04,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:04,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:04,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:04,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:04,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:04,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:05,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:05,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 20:54:05,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 20:54:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 20:54:05,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:05,812 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 20:54:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:07,150 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:54:07,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:54:07,151 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 20:54:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:07,151 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:54:07,152 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:54:07,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:54:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:54:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:54:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:54:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 20:54:07,157 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 20:54:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:07,157 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 20:54:07,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 20:54:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 20:54:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:54:07,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:07,158 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 20:54:07,158 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:07,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:07,159 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 20:54:07,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:07,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:07,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:07,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:07,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:07,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:07,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:07,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:07,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:07,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:07,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:08,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:08,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 20:54:08,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 20:54:08,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 20:54:08,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:08,975 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-30 20:54:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:10,434 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 20:54:10,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:54:10,435 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-30 20:54:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:10,435 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:54:10,435 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 20:54:10,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:54:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 20:54:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 20:54:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 20:54:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 20:54:10,439 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-30 20:54:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:10,439 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 20:54:10,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 20:54:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 20:54:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 20:54:10,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:10,440 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-30 20:54:10,440 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:10,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-30 20:54:10,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:10,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:10,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:10,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:10,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:10,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:10,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:10,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:11,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 20:54:11,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:11,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:12,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:12,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 164 [2018-09-30 20:54:12,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 20:54:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 20:54:12,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:12,299 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-09-30 20:54:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:13,495 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 20:54:13,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:54:13,496 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-09-30 20:54:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:13,497 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:54:13,497 INFO L226 Difference]: Without dead ends: 168 [2018-09-30 20:54:13,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:54:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-30 20:54:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-09-30 20:54:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 20:54:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-09-30 20:54:13,500 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-09-30 20:54:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:13,500 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-09-30 20:54:13,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 20:54:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-09-30 20:54:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 20:54:13,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:13,501 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-09-30 20:54:13,501 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:13,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-09-30 20:54:13,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:13,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:13,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:13,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:13,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:14,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:14,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:14,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:14,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:14,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:14,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:15,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:15,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 20:54:15,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 20:54:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 20:54:15,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:15,312 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-09-30 20:54:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:16,497 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 20:54:16,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:54:16,497 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-09-30 20:54:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:16,498 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:54:16,498 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 20:54:16,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:54:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 20:54:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-09-30 20:54:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 20:54:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-09-30 20:54:16,502 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-09-30 20:54:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:16,502 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-09-30 20:54:16,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 20:54:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-09-30 20:54:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-30 20:54:16,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:16,503 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-09-30 20:54:16,503 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:16,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:16,503 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-09-30 20:54:16,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:16,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:16,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:16,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:16,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:17,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:17,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:17,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:17,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 20:54:17,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:17,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:18,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:18,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 168 [2018-09-30 20:54:18,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 20:54:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 20:54:18,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:18,446 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 170 states. [2018-09-30 20:54:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:19,608 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 20:54:19,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:54:19,609 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 169 [2018-09-30 20:54:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:19,610 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:54:19,610 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 20:54:19,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:54:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 20:54:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 20:54:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 20:54:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-09-30 20:54:19,613 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2018-09-30 20:54:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:19,614 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-09-30 20:54:19,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 20:54:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-09-30 20:54:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 20:54:19,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:19,614 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1] [2018-09-30 20:54:19,615 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:19,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:19,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1887452040, now seen corresponding path program 84 times [2018-09-30 20:54:19,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:19,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:19,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:19,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:19,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:20,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:20,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:20,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:20,339 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 20:54:20,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:20,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:21,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:21,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 170 [2018-09-30 20:54:21,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 20:54:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 20:54:21,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:21,573 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 172 states. [2018-09-30 20:54:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:23,048 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 20:54:23,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:54:23,048 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 171 [2018-09-30 20:54:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:23,049 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:54:23,049 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 20:54:23,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:54:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 20:54:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-09-30 20:54:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-30 20:54:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-09-30 20:54:23,053 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2018-09-30 20:54:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:23,054 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-09-30 20:54:23,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 20:54:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-09-30 20:54:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 20:54:23,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:23,055 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1] [2018-09-30 20:54:23,060 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:23,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1365212618, now seen corresponding path program 85 times [2018-09-30 20:54:23,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:23,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:23,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:23,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:23,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:23,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:23,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:23,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:23,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:24,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:24,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-09-30 20:54:24,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-09-30 20:54:24,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-09-30 20:54:24,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:24,989 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 174 states. [2018-09-30 20:54:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:26,254 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 20:54:26,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:54:26,254 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 173 [2018-09-30 20:54:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:26,255 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:54:26,255 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 20:54:26,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:54:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 20:54:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 20:54:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 20:54:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-09-30 20:54:26,261 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2018-09-30 20:54:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:26,262 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-09-30 20:54:26,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-09-30 20:54:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-09-30 20:54:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-30 20:54:26,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:26,263 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1] [2018-09-30 20:54:26,263 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:26,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2004301708, now seen corresponding path program 86 times [2018-09-30 20:54:26,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:26,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:26,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:26,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:26,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:26,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:26,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:26,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:26,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:26,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:28,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:28,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 174 [2018-09-30 20:54:28,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-09-30 20:54:28,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-09-30 20:54:28,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:28,188 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 176 states. [2018-09-30 20:54:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:29,482 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 20:54:29,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:54:29,482 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 175 [2018-09-30 20:54:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:29,483 INFO L225 Difference]: With dead ends: 179 [2018-09-30 20:54:29,483 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 20:54:29,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:54:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 20:54:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-30 20:54:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 20:54:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-09-30 20:54:29,487 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2018-09-30 20:54:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:29,487 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-09-30 20:54:29,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-09-30 20:54:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-09-30 20:54:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 20:54:29,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:29,488 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1] [2018-09-30 20:54:29,488 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:29,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:29,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1988593870, now seen corresponding path program 87 times [2018-09-30 20:54:29,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:29,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:29,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:30,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:30,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:30,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:30,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 20:54:30,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:30,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:31,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:31,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 176 [2018-09-30 20:54:31,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-09-30 20:54:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-09-30 20:54:31,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:31,682 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 178 states. [2018-09-30 20:54:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:32,985 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 20:54:32,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:54:32,986 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 177 [2018-09-30 20:54:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:32,986 INFO L225 Difference]: With dead ends: 181 [2018-09-30 20:54:32,987 INFO L226 Difference]: Without dead ends: 180 [2018-09-30 20:54:32,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:54:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-09-30 20:54:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-09-30 20:54:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 20:54:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-09-30 20:54:32,990 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2018-09-30 20:54:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:32,991 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-09-30 20:54:32,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-09-30 20:54:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-09-30 20:54:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 20:54:32,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:32,991 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1] [2018-09-30 20:54:32,992 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:32,992 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash -221736560, now seen corresponding path program 88 times [2018-09-30 20:54:32,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:32,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:32,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:32,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:32,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:33,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:33,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:33,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:33,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:33,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:33,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:35,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:35,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 178 [2018-09-30 20:54:35,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-09-30 20:54:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-09-30 20:54:35,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:35,041 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 180 states. [2018-09-30 20:54:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:36,507 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 20:54:36,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:54:36,507 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 179 [2018-09-30 20:54:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:36,508 INFO L225 Difference]: With dead ends: 183 [2018-09-30 20:54:36,508 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 20:54:36,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:54:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 20:54:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-30 20:54:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 20:54:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-09-30 20:54:36,512 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2018-09-30 20:54:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:36,512 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-09-30 20:54:36,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-09-30 20:54:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-09-30 20:54:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-30 20:54:36,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:36,513 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1] [2018-09-30 20:54:36,513 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:36,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1659531730, now seen corresponding path program 89 times [2018-09-30 20:54:36,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:36,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:36,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:36,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:36,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:37,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:37,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:37,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:37,217 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 20:54:37,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:37,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:38,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:38,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 180 [2018-09-30 20:54:38,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-09-30 20:54:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-09-30 20:54:38,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:38,597 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 182 states. [2018-09-30 20:54:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:39,852 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 20:54:39,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:54:39,852 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 181 [2018-09-30 20:54:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:39,853 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:54:39,853 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 20:54:39,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:54:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 20:54:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-30 20:54:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 20:54:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-09-30 20:54:39,857 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2018-09-30 20:54:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:39,857 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-09-30 20:54:39,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-09-30 20:54:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-09-30 20:54:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 20:54:39,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:39,858 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1] [2018-09-30 20:54:39,858 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:39,859 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1377126804, now seen corresponding path program 90 times [2018-09-30 20:54:39,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:39,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:39,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:39,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:39,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:40,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:40,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:40,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:54:40,566 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 20:54:40,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:40,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:42,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:42,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 182 [2018-09-30 20:54:42,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-09-30 20:54:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-09-30 20:54:42,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:42,023 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 184 states. [2018-09-30 20:54:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:43,509 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 20:54:43,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:54:43,510 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 183 [2018-09-30 20:54:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:43,510 INFO L225 Difference]: With dead ends: 187 [2018-09-30 20:54:43,510 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 20:54:43,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:54:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 20:54:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-30 20:54:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-30 20:54:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-09-30 20:54:43,516 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2018-09-30 20:54:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:43,516 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-09-30 20:54:43,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-09-30 20:54:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-09-30 20:54:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-30 20:54:43,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:43,517 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1] [2018-09-30 20:54:43,518 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:43,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash 568932566, now seen corresponding path program 91 times [2018-09-30 20:54:43,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:43,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:43,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:43,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:43,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:44,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:44,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:44,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:44,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:45,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:45,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 184 [2018-09-30 20:54:45,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-09-30 20:54:45,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-09-30 20:54:45,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:45,717 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 186 states. [2018-09-30 20:54:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:47,102 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 20:54:47,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:54:47,102 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 185 [2018-09-30 20:54:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:47,103 INFO L225 Difference]: With dead ends: 189 [2018-09-30 20:54:47,103 INFO L226 Difference]: Without dead ends: 188 [2018-09-30 20:54:47,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:54:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-30 20:54:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-09-30 20:54:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-09-30 20:54:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-09-30 20:54:47,108 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2018-09-30 20:54:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:47,108 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-09-30 20:54:47,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-09-30 20:54:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-09-30 20:54:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-30 20:54:47,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:47,110 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1] [2018-09-30 20:54:47,110 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:47,110 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:47,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350424, now seen corresponding path program 92 times [2018-09-30 20:54:47,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:47,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:47,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:47,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:54:47,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:47,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:47,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:47,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:54:47,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:54:47,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:47,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:49,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:49,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 186 [2018-09-30 20:54:49,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-09-30 20:54:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-09-30 20:54:49,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:49,201 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 188 states. [2018-09-30 20:54:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:50,549 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 20:54:50,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:54:50,550 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 187 [2018-09-30 20:54:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:50,550 INFO L225 Difference]: With dead ends: 191 [2018-09-30 20:54:50,551 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 20:54:50,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:54:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 20:54:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-30 20:54:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 20:54:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-09-30 20:54:50,556 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2018-09-30 20:54:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:50,556 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-09-30 20:54:50,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-09-30 20:54:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-09-30 20:54:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-30 20:54:50,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:50,557 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1] [2018-09-30 20:54:50,557 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:50,557 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:50,558 INFO L82 PathProgramCache]: Analyzing trace with hash 644144602, now seen corresponding path program 93 times [2018-09-30 20:54:50,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:50,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:50,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:50,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:50,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:51,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:51,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:51,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:54:51,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 20:54:51,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:51,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:52,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:52,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 188 [2018-09-30 20:54:52,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-09-30 20:54:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-09-30 20:54:52,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:52,790 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 190 states. [2018-09-30 20:54:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:54,091 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 20:54:54,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:54:54,091 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 189 [2018-09-30 20:54:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:54,092 INFO L225 Difference]: With dead ends: 193 [2018-09-30 20:54:54,092 INFO L226 Difference]: Without dead ends: 192 [2018-09-30 20:54:54,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:54:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-30 20:54:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-09-30 20:54:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-09-30 20:54:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-09-30 20:54:54,096 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2018-09-30 20:54:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:54,096 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-09-30 20:54:54,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-09-30 20:54:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-09-30 20:54:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 20:54:54,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:54,097 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1] [2018-09-30 20:54:54,097 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:54,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 547672988, now seen corresponding path program 94 times [2018-09-30 20:54:54,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:54,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:54,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:54,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:54,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:54,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:54,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:54,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:54:54,799 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:54:54,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:54,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:54:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:56,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:54:56,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 190 [2018-09-30 20:54:56,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-09-30 20:54:56,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-09-30 20:54:56,374 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:54:56,374 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 192 states. [2018-09-30 20:54:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:54:57,709 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 20:54:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:54:57,709 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 191 [2018-09-30 20:54:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:54:57,710 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:54:57,710 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:54:57,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:54:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:54:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-30 20:54:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-30 20:54:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-09-30 20:54:57,714 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2018-09-30 20:54:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:54:57,714 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-09-30 20:54:57,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-09-30 20:54:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-09-30 20:54:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-30 20:54:57,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:54:57,715 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1] [2018-09-30 20:54:57,715 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:54:57,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:54:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1967234850, now seen corresponding path program 95 times [2018-09-30 20:54:57,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:54:57,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:54:57,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:57,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:54:57,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:54:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:54:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:54:58,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:54:58,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:54:58,348 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:54:58,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 20:54:58,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:54:58,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:00,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:00,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 192 [2018-09-30 20:55:00,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-09-30 20:55:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-09-30 20:55:00,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:00,067 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 194 states. [2018-09-30 20:55:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:01,581 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 20:55:01,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:55:01,581 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 193 [2018-09-30 20:55:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:01,582 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:55:01,582 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 20:55:01,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:55:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 20:55:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 20:55:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 20:55:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-09-30 20:55:01,586 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2018-09-30 20:55:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:01,586 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-09-30 20:55:01,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-09-30 20:55:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-09-30 20:55:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-30 20:55:01,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:01,588 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1] [2018-09-30 20:55:01,588 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:01,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:01,588 INFO L82 PathProgramCache]: Analyzing trace with hash -727079520, now seen corresponding path program 96 times [2018-09-30 20:55:01,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:01,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:01,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:01,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:01,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:02,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:02,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:02,237 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:55:02,357 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 20:55:02,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:02,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:03,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:03,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 194 [2018-09-30 20:55:03,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-09-30 20:55:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-09-30 20:55:03,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:03,872 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 196 states. [2018-09-30 20:55:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:05,176 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 20:55:05,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:55:05,177 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 195 [2018-09-30 20:55:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:05,177 INFO L225 Difference]: With dead ends: 199 [2018-09-30 20:55:05,178 INFO L226 Difference]: Without dead ends: 198 [2018-09-30 20:55:05,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:55:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-30 20:55:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-09-30 20:55:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-09-30 20:55:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-09-30 20:55:05,184 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2018-09-30 20:55:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:05,184 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-09-30 20:55:05,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-09-30 20:55:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-09-30 20:55:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 20:55:05,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:05,185 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1] [2018-09-30 20:55:05,185 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:05,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1356251618, now seen corresponding path program 97 times [2018-09-30 20:55:05,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:05,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:05,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:05,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:05,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:05,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:05,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:05,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:05,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:07,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:07,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 196 [2018-09-30 20:55:07,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-09-30 20:55:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-09-30 20:55:07,452 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:07,453 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 198 states. [2018-09-30 20:55:08,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:08,730 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 20:55:08,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:55:08,730 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 197 [2018-09-30 20:55:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:08,731 INFO L225 Difference]: With dead ends: 201 [2018-09-30 20:55:08,731 INFO L226 Difference]: Without dead ends: 200 [2018-09-30 20:55:08,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:55:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-30 20:55:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-30 20:55:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 20:55:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-09-30 20:55:08,735 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2018-09-30 20:55:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:08,735 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-09-30 20:55:08,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-09-30 20:55:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-09-30 20:55:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-30 20:55:08,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:08,736 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1] [2018-09-30 20:55:08,736 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:08,737 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1982715300, now seen corresponding path program 98 times [2018-09-30 20:55:08,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:08,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:08,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:08,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:08,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:09,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:09,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:09,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:09,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:09,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:09,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:11,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:11,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 198 [2018-09-30 20:55:11,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-09-30 20:55:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-09-30 20:55:11,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:11,100 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 200 states. [2018-09-30 20:55:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:12,449 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 20:55:12,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:55:12,449 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 199 [2018-09-30 20:55:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:12,450 INFO L225 Difference]: With dead ends: 203 [2018-09-30 20:55:12,450 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 20:55:12,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:55:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 20:55:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-30 20:55:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 20:55:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-09-30 20:55:12,454 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2018-09-30 20:55:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:12,455 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-09-30 20:55:12,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-09-30 20:55:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-09-30 20:55:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-09-30 20:55:12,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:12,456 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1] [2018-09-30 20:55:12,456 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:12,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1576075034, now seen corresponding path program 99 times [2018-09-30 20:55:12,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:12,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:12,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:12,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:12,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:13,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:13,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:13,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:13,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 20:55:13,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:13,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:14,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:14,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 200 [2018-09-30 20:55:14,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-09-30 20:55:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-09-30 20:55:14,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:14,873 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 202 states. [2018-09-30 20:55:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:16,367 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 20:55:16,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:55:16,368 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 201 [2018-09-30 20:55:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:16,369 INFO L225 Difference]: With dead ends: 205 [2018-09-30 20:55:16,369 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 20:55:16,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:55:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 20:55:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-09-30 20:55:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-30 20:55:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-09-30 20:55:16,373 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2018-09-30 20:55:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:16,373 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-09-30 20:55:16,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-09-30 20:55:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-09-30 20:55:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 20:55:16,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:16,374 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1] [2018-09-30 20:55:16,374 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:16,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1515348904, now seen corresponding path program 100 times [2018-09-30 20:55:16,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:16,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:16,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:16,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:16,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:17,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:17,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:17,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:17,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:17,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:17,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:18,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:18,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 202 [2018-09-30 20:55:18,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-09-30 20:55:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-09-30 20:55:18,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:18,759 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 204 states. [2018-09-30 20:55:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:20,318 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 20:55:20,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:55:20,318 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 203 [2018-09-30 20:55:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:20,319 INFO L225 Difference]: With dead ends: 207 [2018-09-30 20:55:20,319 INFO L226 Difference]: Without dead ends: 206 [2018-09-30 20:55:20,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:55:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-30 20:55:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-30 20:55:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-30 20:55:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-09-30 20:55:20,325 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2018-09-30 20:55:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:20,325 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-09-30 20:55:20,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-09-30 20:55:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-09-30 20:55:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-30 20:55:20,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:20,327 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1] [2018-09-30 20:55:20,327 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:20,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 256384490, now seen corresponding path program 101 times [2018-09-30 20:55:20,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:20,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:20,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:21,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:21,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:21,052 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:55:21,330 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 20:55:21,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:21,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:22,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:22,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 204 [2018-09-30 20:55:22,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-09-30 20:55:23,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-09-30 20:55:23,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:23,002 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 206 states. [2018-09-30 20:55:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:24,699 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 20:55:24,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:55:24,699 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 205 [2018-09-30 20:55:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:24,700 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:55:24,700 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 20:55:24,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:55:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 20:55:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-30 20:55:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 20:55:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-09-30 20:55:24,706 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2018-09-30 20:55:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:24,707 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-09-30 20:55:24,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-09-30 20:55:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-09-30 20:55:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 20:55:24,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:24,708 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1] [2018-09-30 20:55:24,708 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:24,708 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1572360108, now seen corresponding path program 102 times [2018-09-30 20:55:24,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:24,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:24,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:24,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:24,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:25,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:25,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:25,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:55:25,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 20:55:25,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:25,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:27,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:27,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 206 [2018-09-30 20:55:27,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-09-30 20:55:27,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-09-30 20:55:27,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:27,221 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 208 states. [2018-09-30 20:55:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:29,196 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 20:55:29,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:55:29,197 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 207 [2018-09-30 20:55:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:29,197 INFO L225 Difference]: With dead ends: 211 [2018-09-30 20:55:29,197 INFO L226 Difference]: Without dead ends: 210 [2018-09-30 20:55:29,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:55:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-09-30 20:55:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-09-30 20:55:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 20:55:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-09-30 20:55:29,203 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2018-09-30 20:55:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:29,203 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-09-30 20:55:29,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-09-30 20:55:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-09-30 20:55:29,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 20:55:29,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:29,205 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1] [2018-09-30 20:55:29,205 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:29,205 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash -790423314, now seen corresponding path program 103 times [2018-09-30 20:55:29,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:29,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:29,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:29,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:29,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:29,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:29,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:29,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:29,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:31,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:31,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 208 [2018-09-30 20:55:31,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-09-30 20:55:31,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-09-30 20:55:31,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:31,703 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 210 states. [2018-09-30 20:55:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:33,112 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 20:55:33,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:55:33,112 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 209 [2018-09-30 20:55:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:33,113 INFO L225 Difference]: With dead ends: 213 [2018-09-30 20:55:33,113 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 20:55:33,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:55:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 20:55:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-30 20:55:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-30 20:55:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-09-30 20:55:33,118 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2018-09-30 20:55:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:33,118 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-09-30 20:55:33,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-09-30 20:55:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-09-30 20:55:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-09-30 20:55:33,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:33,120 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1] [2018-09-30 20:55:33,120 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:33,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:33,120 INFO L82 PathProgramCache]: Analyzing trace with hash 612407728, now seen corresponding path program 104 times [2018-09-30 20:55:33,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:33,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:33,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:33,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:55:33,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:33,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:33,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:33,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:55:33,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:55:33,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:33,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:35,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:35,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 210 [2018-09-30 20:55:35,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-09-30 20:55:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-09-30 20:55:35,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:35,582 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 212 states. [2018-09-30 20:55:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:37,305 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 20:55:37,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:55:37,306 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 211 [2018-09-30 20:55:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:37,306 INFO L225 Difference]: With dead ends: 215 [2018-09-30 20:55:37,307 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 20:55:37,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:55:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 20:55:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-30 20:55:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-30 20:55:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-09-30 20:55:37,312 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2018-09-30 20:55:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:37,312 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-09-30 20:55:37,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-09-30 20:55:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-09-30 20:55:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-30 20:55:37,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:37,314 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1] [2018-09-30 20:55:37,314 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:37,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:37,314 INFO L82 PathProgramCache]: Analyzing trace with hash 113308146, now seen corresponding path program 105 times [2018-09-30 20:55:37,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:37,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:37,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:37,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:37,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:38,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:38,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:38,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:55:38,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 20:55:38,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:38,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:39,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:39,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 212 [2018-09-30 20:55:39,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-09-30 20:55:39,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-09-30 20:55:39,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:39,994 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 214 states. [2018-09-30 20:55:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:41,897 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 20:55:41,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:55:41,897 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 213 [2018-09-30 20:55:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:41,898 INFO L225 Difference]: With dead ends: 217 [2018-09-30 20:55:41,898 INFO L226 Difference]: Without dead ends: 216 [2018-09-30 20:55:41,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:55:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-30 20:55:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-09-30 20:55:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-09-30 20:55:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-09-30 20:55:41,904 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2018-09-30 20:55:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:41,904 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-09-30 20:55:41,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-09-30 20:55:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-09-30 20:55:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-09-30 20:55:41,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:41,905 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1] [2018-09-30 20:55:41,906 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:41,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:41,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1514946996, now seen corresponding path program 106 times [2018-09-30 20:55:41,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:41,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:41,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:41,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:41,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:55:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:42,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:55:42,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:55:42,673 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:55:42,734 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:55:42,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:55:42,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:55:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:55:44,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:55:44,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 214 [2018-09-30 20:55:44,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-09-30 20:55:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-09-30 20:55:44,452 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:55:44,452 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 216 states. [2018-09-30 20:55:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:55:46,079 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 20:55:46,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:55:46,079 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 215 [2018-09-30 20:55:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:55:46,080 INFO L225 Difference]: With dead ends: 219 [2018-09-30 20:55:46,080 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 20:55:46,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:55:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 20:55:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-09-30 20:55:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-30 20:55:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-09-30 20:55:46,084 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2018-09-30 20:55:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:55:46,084 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-09-30 20:55:46,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-09-30 20:55:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-09-30 20:55:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-30 20:55:46,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:55:46,085 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1] [2018-09-30 20:55:46,085 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:55:46,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:55:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash -129849098, now seen corresponding path program 107 times [2018-09-30 20:55:46,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:55:46,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:55:46,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:46,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:55:46,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:55:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:55:46,483 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:55:46,487 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:55:46,487 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:55:46 BoogieIcfgContainer [2018-09-30 20:55:46,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:55:46,488 INFO L168 Benchmark]: Toolchain (without parser) took 243052.44 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 63.4 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 373.0 MB). Peak memory consumption was 436.4 MB. Max. memory is 7.1 GB. [2018-09-30 20:55:46,490 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:55:46,491 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:55:46,491 INFO L168 Benchmark]: Boogie Preprocessor took 23.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:55:46,491 INFO L168 Benchmark]: RCFGBuilder took 290.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:55:46,492 INFO L168 Benchmark]: TraceAbstraction took 242687.20 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 63.4 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 351.9 MB). Peak memory consumption was 415.3 MB. Max. memory is 7.1 GB. [2018-09-30 20:55:46,495 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 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 290.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242687.20 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 63.4 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 351.9 MB). Peak memory consumption was 415.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 218 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 216 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 242.6s OverallTime, 108 OverallIterations, 108 TraceHistogramMax, 91.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 216 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 22489 SolverSat, 322 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17332 GetRequests, 5777 SyntacticMatches, 0 SemanticMatches, 11555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=107, 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, 107 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 6.6s SatisfiabilityAnalysisTime, 137.2s InterpolantComputationTime, 23323 NumberOfCodeBlocks, 23323 NumberOfCodeBlocksAsserted, 3040 NumberOfCheckSat, 23110 ConstructedInterpolants, 0 QuantifiedInterpolants, 19876292 SizeOfPredicates, 0 NumberOfNonLiveVariables, 23532 ConjunctsInSsa, 5989 ConjunctsInUnsatCore, 213 InterpolantComputations, 1 PerfectInterpolantSequences, 0/816624 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-55-46-505.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-55-46-505.csv Completed graceful shutdown