java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:31:05,326 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:31:05,328 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:31:05,342 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 12:31:05,389 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 12:31:05,420 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:31:05,421 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:31:05,421 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:31:05,422 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:31:05,422 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:31:05,422 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:31:05,422 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:31:05,424 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:31:05,424 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:31:05,424 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:31:05,424 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:31:05,424 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:31:05,425 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:31:05,425 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:31:05,425 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:31:05,425 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:31:05,425 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:31:05,425 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:31:05,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:31:05,427 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:31:05,427 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:31:05,427 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:31:05,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:31:05,428 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:31:05,428 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:31:05,428 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:31:05,428 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:31:05,429 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:31:05,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:31:05,429 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:31:05,474 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:31:05,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:31:05,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:31:05,496 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:31:05,496 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:31:05,497 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-10-04 12:31:05,497 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-10-04 12:31:05,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:31:05,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:31:05,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:31:05,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:31:05,550 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:31:05,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,582 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:31:05,583 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:31:05,583 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:31:05,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:31:05,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:31:05,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:31:05,585 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:31:05,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... [2018-10-04 12:31:05,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:31:05,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:31:05,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:31:05,605 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:31:05,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:31:05,676 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 12:31:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 12:31:05,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 12:31:05,934 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:31:05,935 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:31:05 BoogieIcfgContainer [2018-10-04 12:31:05,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:31:05,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:31:05,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:31:05,940 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:31:05,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:31:05" (1/2) ... [2018-10-04 12:31:05,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6543f3b1 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:31:05, skipping insertion in model container [2018-10-04 12:31:05,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:31:05" (2/2) ... [2018-10-04 12:31:05,944 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-10-04 12:31:05,956 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:31:05,968 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:31:06,017 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:31:06,018 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:31:06,018 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:31:06,018 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:31:06,018 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:31:06,018 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:31:06,019 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:31:06,019 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:31:06,019 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:31:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:31:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 12:31:06,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:06,041 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 12:31:06,042 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:06,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-10-04 12:31:06,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:06,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:06,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:31:06,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:31:06,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:31:06,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:31:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:31:06,234 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:31:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:06,323 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 12:31:06,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:31:06,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 12:31:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:06,339 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:31:06,339 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:31:06,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:31:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:31:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:31:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:31:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-10-04 12:31:06,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-10-04 12:31:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:06,383 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-10-04 12:31:06,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:31:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-10-04 12:31:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:31:06,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:06,384 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 12:31:06,384 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:06,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-10-04 12:31:06,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:06,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:06,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:31:06,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:31:06,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:31:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:31:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:31:06,449 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-10-04 12:31:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:06,468 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-10-04 12:31:06,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:31:06,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 12:31:06,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:06,476 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:31:06,476 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:31:06,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:31:06,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:31:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:31:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:31:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 12:31:06,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-04 12:31:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:06,480 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 12:31:06,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:31:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 12:31:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:31:06,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:06,484 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 12:31:06,484 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:06,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-10-04 12:31:06,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:06,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:06,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:06,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:06,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:06,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 12:31:06,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:31:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:31:06,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:31:06,600 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-04 12:31:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:06,659 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-10-04 12:31:06,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:31:06,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-04 12:31:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:06,660 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:31:06,660 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:31:06,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:31:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:31:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:31:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:31:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 12:31:06,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-10-04 12:31:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:06,664 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 12:31:06,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:31:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 12:31:06,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:31:06,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:06,665 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-10-04 12:31:06,666 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:06,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:06,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-10-04 12:31:06,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:06,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:06,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:06,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:06,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:06,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:31:06,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:31:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:31:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:31:06,793 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-04 12:31:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:06,819 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-10-04 12:31:06,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:31:06,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 12:31:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:06,820 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:31:06,820 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:31:06,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:31:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:31:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:31:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:31:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-04 12:31:06,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-10-04 12:31:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:06,825 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-04 12:31:06,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:31:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-04 12:31:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:31:06,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:06,826 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-10-04 12:31:06,827 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:06,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-10-04 12:31:06,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:06,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:06,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:06,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:06,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:06,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:06,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:06,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:06,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:06,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:31:06,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:31:06,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:31:06,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:31:06,954 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-10-04 12:31:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:07,024 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 12:31:07,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:31:07,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:31:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:07,025 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:31:07,025 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:31:07,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:31:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:31:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:31:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:31:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-04 12:31:07,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-04 12:31:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:07,030 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-04 12:31:07,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:31:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-04 12:31:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:31:07,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:07,031 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-10-04 12:31:07,031 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:07,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-10-04 12:31:07,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:07,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:07,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:07,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:07,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:07,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:07,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:07,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:07,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:07,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:31:07,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:31:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:31:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:31:07,203 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-10-04 12:31:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:07,308 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-10-04 12:31:07,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:31:07,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-04 12:31:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:07,310 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:31:07,310 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:31:07,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:31:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:31:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:31:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:31:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 12:31:07,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 12:31:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:07,316 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 12:31:07,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:31:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 12:31:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:31:07,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:07,317 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-10-04 12:31:07,317 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:07,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-10-04 12:31:07,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:07,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:07,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:07,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:07,481 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:31:07,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:07,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:07,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:31:07,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:31:07,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:31:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:31:07,523 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-04 12:31:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:07,564 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-10-04 12:31:07,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:31:07,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 12:31:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:07,565 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:31:07,565 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:31:07,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:31:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:31:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:31:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:31:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 12:31:07,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-10-04 12:31:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:07,571 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 12:31:07,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:31:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 12:31:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:31:07,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:07,572 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-10-04 12:31:07,572 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:07,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-10-04 12:31:07,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:07,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:07,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:07,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:07,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:07,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:07,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 12:31:07,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:07,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:07,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 12:31:07,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:31:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:31:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:31:07,858 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-10-04 12:31:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:08,398 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-04 12:31:08,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:31:08,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-04 12:31:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:08,399 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:31:08,400 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:31:08,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:31:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:31:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:31:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:31:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-04 12:31:08,408 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-04 12:31:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:08,408 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-04 12:31:08,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:31:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-04 12:31:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:31:08,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:08,409 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-10-04 12:31:08,411 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:08,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-10-04 12:31:08,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:08,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:08,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:08,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:08,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:08,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:08,545 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:08,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:08,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:08,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:31:08,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:31:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:31:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:31:08,575 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-10-04 12:31:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:08,602 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-04 12:31:08,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:31:08,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-10-04 12:31:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:08,604 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:31:08,604 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:31:08,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:31:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:31:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:31:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:31:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 12:31:08,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 12:31:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:08,612 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 12:31:08,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:31:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 12:31:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:31:08,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:08,613 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-10-04 12:31:08,613 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:08,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-10-04 12:31:08,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:08,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:08,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:08,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:08,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:08,723 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:08,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:08,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:08,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:31:08,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:31:08,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:31:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:31:08,760 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-04 12:31:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:08,813 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-04 12:31:08,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:31:08,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-04 12:31:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:08,815 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:31:08,815 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:31:08,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:31:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:31:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:31:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:31:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 12:31:08,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-04 12:31:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:08,821 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 12:31:08,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:31:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 12:31:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:31:08,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:08,822 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-10-04 12:31:08,823 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:08,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-10-04 12:31:08,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:08,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:08,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:08,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:09,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:09,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:09,049 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:31:09,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:09,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:09,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:31:09,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:31:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:31:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:31:09,084 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-10-04 12:31:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:09,139 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-04 12:31:09,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:31:09,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-04 12:31:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:09,140 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:31:09,140 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:31:09,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:31:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:31:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:31:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:31:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-04 12:31:09,144 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-04 12:31:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:09,145 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-04 12:31:09,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:31:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-04 12:31:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:31:09,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:09,146 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-10-04 12:31:09,146 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:09,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:09,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-10-04 12:31:09,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:09,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:09,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:09,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:09,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:09,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:09,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:09,349 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:31:09,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:09,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:09,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:31:09,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:31:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:31:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:31:09,380 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-10-04 12:31:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:09,409 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-04 12:31:09,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:31:09,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-10-04 12:31:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:09,410 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:31:09,410 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:31:09,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:31:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:31:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:31:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:31:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 12:31:09,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-04 12:31:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:09,415 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 12:31:09,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:31:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 12:31:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:31:09,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:09,416 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-10-04 12:31:09,417 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:09,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-10-04 12:31:09,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:09,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:09,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:09,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:09,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:09,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:09,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:09,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 12:31:09,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:09,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:09,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 12:31:09,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:31:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:31:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:31:09,797 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-10-04 12:31:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:10,178 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-10-04 12:31:10,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:31:10,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-04 12:31:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:10,179 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:31:10,179 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:31:10,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:31:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:31:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:31:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:31:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 12:31:10,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 12:31:10,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:10,185 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 12:31:10,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:31:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 12:31:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:31:10,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:10,186 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-10-04 12:31:10,186 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:10,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-10-04 12:31:10,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:10,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:10,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:10,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:10,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:10,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:10,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:10,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:31:10,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:31:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:31:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:31:10,520 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-10-04 12:31:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:10,550 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-04 12:31:10,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:31:10,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-10-04 12:31:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:10,552 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:31:10,554 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:31:10,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:31:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:31:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:31:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:31:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-04 12:31:10,559 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-04 12:31:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:10,559 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-04 12:31:10,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:31:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-04 12:31:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:31:10,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:10,560 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-10-04 12:31:10,561 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:10,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-10-04 12:31:10,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:10,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:10,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:10,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:10,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:10,719 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:10,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 12:31:10,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:10,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:10,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:31:10,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:31:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:31:10,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:31:10,769 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-10-04 12:31:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:10,821 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-04 12:31:10,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:31:10,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-10-04 12:31:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:10,822 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:31:10,822 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:31:10,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:31:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:31:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:31:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:31:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 12:31:10,827 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-10-04 12:31:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:10,828 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 12:31:10,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:31:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 12:31:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:31:10,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:10,829 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-10-04 12:31:10,829 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:10,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-10-04 12:31:10,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:10,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:10,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:10,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:10,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:10,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:11,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:11,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:11,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:11,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:11,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:31:11,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:31:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:31:11,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:31:11,055 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-10-04 12:31:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:11,096 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-10-04 12:31:11,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:31:11,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-04 12:31:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:11,097 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:31:11,097 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:31:11,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:31:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:31:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:31:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:31:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 12:31:11,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 12:31:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:11,102 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 12:31:11,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:31:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 12:31:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:31:11,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:11,104 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-10-04 12:31:11,104 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:11,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-10-04 12:31:11,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:11,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:11,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:11,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:11,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:11,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:11,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:11,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:11,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:11,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:11,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:31:11,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:31:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:31:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:31:11,302 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-10-04 12:31:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:11,336 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-04 12:31:11,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:31:11,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-10-04 12:31:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:11,338 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:31:11,338 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:31:11,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:31:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:31:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:31:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:31:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 12:31:11,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-10-04 12:31:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:11,344 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 12:31:11,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:31:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 12:31:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:31:11,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:11,345 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-10-04 12:31:11,345 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:11,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-10-04 12:31:11,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:11,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:11,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:11,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:11,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:11,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:11,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:11,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:11,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 12:31:11,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:11,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:12,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:12,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 12:31:12,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:31:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:31:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:31:12,006 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-10-04 12:31:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:12,707 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-10-04 12:31:12,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:31:12,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-10-04 12:31:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:12,708 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:31:12,708 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:31:12,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:31:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:31:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:31:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:31:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-04 12:31:12,715 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-10-04 12:31:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:12,715 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-04 12:31:12,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:31:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-04 12:31:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:31:12,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:12,717 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-10-04 12:31:12,717 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:12,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-10-04 12:31:12,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:12,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:12,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:12,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:12,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:12,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:12,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:12,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:12,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:12,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:12,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:13,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:13,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 12:31:13,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:31:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:31:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:31:13,084 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-10-04 12:31:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:13,493 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-04 12:31:13,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:31:13,494 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-10-04 12:31:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:13,494 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:31:13,494 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:31:13,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:31:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:31:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:31:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:31:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 12:31:13,502 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-10-04 12:31:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:13,502 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 12:31:13,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:31:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 12:31:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:31:13,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:13,503 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-10-04 12:31:13,504 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:13,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-10-04 12:31:13,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:13,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:13,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:13,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:13,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:13,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:13,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:13,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:13,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:31:13,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:13,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:13,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:13,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:31:13,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:31:13,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:31:13,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:31:13,701 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-10-04 12:31:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:13,762 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-04 12:31:13,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:31:13,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-04 12:31:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:13,765 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:31:13,765 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:31:13,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:31:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:31:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:31:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:31:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 12:31:13,770 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-04 12:31:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:13,770 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 12:31:13,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:31:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 12:31:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:31:13,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:13,771 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-10-04 12:31:13,771 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:13,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-10-04 12:31:13,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:13,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:13,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:13,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:13,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:13,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:13,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:13,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:13,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:13,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:13,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:13,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:13,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:31:13,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:31:13,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:31:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:31:13,991 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-04 12:31:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:14,071 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-10-04 12:31:14,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:31:14,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-10-04 12:31:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:14,072 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:31:14,072 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:31:14,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:31:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:31:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:31:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:31:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-04 12:31:14,076 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-10-04 12:31:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:14,077 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-04 12:31:14,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:31:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-04 12:31:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:31:14,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:14,078 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-10-04 12:31:14,078 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:14,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:14,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-10-04 12:31:14,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:14,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:14,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:14,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:14,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:14,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:14,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:14,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:14,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 12:31:14,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:14,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:15,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:15,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 12:31:15,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:31:15,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:31:15,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:31:15,368 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-10-04 12:31:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:15,906 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-04 12:31:15,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:31:15,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-10-04 12:31:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:15,910 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:31:15,910 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:31:15,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:31:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:31:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:31:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:31:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 12:31:15,915 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-10-04 12:31:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:15,915 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 12:31:15,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:31:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 12:31:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:31:15,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:15,916 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-10-04 12:31:15,916 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:15,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:15,917 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-10-04 12:31:15,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:15,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:15,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:15,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:15,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:16,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:16,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:16,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:16,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:16,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:16,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:31:16,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:31:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:31:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:31:16,334 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-10-04 12:31:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:16,453 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-04 12:31:16,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:31:16,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 12:31:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:16,454 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:31:16,454 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:31:16,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:31:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:31:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:31:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:31:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-04 12:31:16,460 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-04 12:31:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:16,460 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-04 12:31:16,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:31:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-04 12:31:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:31:16,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:16,461 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-10-04 12:31:16,461 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:16,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-10-04 12:31:16,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:16,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:16,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:16,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:16,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:16,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:16,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:16,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:31:16,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:16,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:16,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:16,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:31:16,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:31:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:31:16,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:31:16,814 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-10-04 12:31:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:16,968 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-10-04 12:31:16,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:31:16,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-04 12:31:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:16,970 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:31:16,970 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:31:16,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:31:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:31:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:31:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:31:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-04 12:31:16,975 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-10-04 12:31:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:16,975 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-04 12:31:16,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:31:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-04 12:31:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:31:16,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:16,977 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-10-04 12:31:16,977 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:16,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-10-04 12:31:16,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:16,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:16,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:16,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:17,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:17,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:17,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:17,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:17,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:17,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:17,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:17,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:31:17,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:31:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:31:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:31:17,227 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-10-04 12:31:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:17,269 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-10-04 12:31:17,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:31:17,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-10-04 12:31:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:17,270 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:31:17,270 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:31:17,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:31:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:31:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:31:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:31:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 12:31:17,275 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 12:31:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:17,276 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 12:31:17,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:31:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 12:31:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:31:17,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:17,276 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-10-04 12:31:17,277 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:17,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-10-04 12:31:17,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:17,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:17,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:17,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:17,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:17,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:17,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:17,502 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:17,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:17,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:17,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:17,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:17,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:31:17,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:31:17,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:31:17,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:31:17,559 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-10-04 12:31:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:17,652 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-10-04 12:31:17,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:31:17,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-10-04 12:31:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:17,653 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:31:17,653 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:31:17,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:31:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:31:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:31:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:31:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 12:31:17,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-10-04 12:31:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:17,657 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 12:31:17,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:31:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 12:31:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:31:17,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:17,658 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-10-04 12:31:17,658 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:17,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-10-04 12:31:17,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:17,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:17,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:18,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:18,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:18,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:18,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 12:31:18,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:18,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:18,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:18,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 12:31:18,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:31:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:31:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:31:18,646 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-10-04 12:31:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:19,802 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-04 12:31:19,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:31:19,802 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-10-04 12:31:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:19,803 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:31:19,803 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:31:19,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:31:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:31:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:31:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:31:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 12:31:19,809 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-10-04 12:31:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:19,809 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 12:31:19,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:31:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 12:31:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:31:19,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:19,810 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-10-04 12:31:19,810 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:19,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-10-04 12:31:19,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:19,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:19,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:19,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:19,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:19,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:19,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:19,981 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:19,999 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:19,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:20,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:20,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:20,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:31:20,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:31:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:31:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:31:20,030 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-10-04 12:31:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:20,087 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-10-04 12:31:20,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:31:20,088 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-10-04 12:31:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:20,088 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:31:20,089 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:31:20,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:31:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:31:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:31:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:31:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 12:31:20,093 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 12:31:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:20,093 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 12:31:20,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:31:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 12:31:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:31:20,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:20,094 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-10-04 12:31:20,094 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:20,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-10-04 12:31:20,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:20,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:20,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:20,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:20,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:20,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:20,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:20,323 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:20,349 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:31:20,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:20,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:20,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:20,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:31:20,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:31:20,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:31:20,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:31:20,385 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-10-04 12:31:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:20,427 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-10-04 12:31:20,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:31:20,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-10-04 12:31:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:20,428 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:31:20,428 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:31:20,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:31:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:31:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:31:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:31:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 12:31:20,432 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-10-04 12:31:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:20,433 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 12:31:20,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:31:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 12:31:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:31:20,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:20,434 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-10-04 12:31:20,434 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:20,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-10-04 12:31:20,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:20,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:20,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:20,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:20,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:21,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:21,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:21,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:21,060 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:31:21,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:21,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:21,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:21,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:31:21,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:31:21,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:31:21,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:31:21,102 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-10-04 12:31:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:21,193 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-10-04 12:31:21,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:31:21,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-10-04 12:31:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:21,194 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:31:21,194 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:31:21,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:31:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:31:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:31:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:31:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 12:31:21,199 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-04 12:31:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:21,199 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 12:31:21,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:31:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 12:31:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:31:21,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:21,200 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-10-04 12:31:21,200 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:21,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-10-04 12:31:21,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:21,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:21,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:21,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:21,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:22,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:22,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:22,126 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:22,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:31:22,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:22,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:22,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:22,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:31:22,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:31:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:31:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:31:22,192 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-10-04 12:31:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:22,241 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-10-04 12:31:22,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:31:22,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-10-04 12:31:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:22,243 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:31:22,243 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:31:22,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:31:22,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:31:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:31:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:31:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 12:31:22,247 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-10-04 12:31:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:22,248 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 12:31:22,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:31:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 12:31:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:31:22,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:22,249 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-10-04 12:31:22,249 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:22,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-10-04 12:31:22,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:22,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:22,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:22,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:22,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:22,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:22,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:22,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:22,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 12:31:22,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:22,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:23,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:23,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 12:31:23,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:31:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:31:23,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:31:23,227 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-10-04 12:31:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:24,191 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-04 12:31:24,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:31:24,192 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-10-04 12:31:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:24,193 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:31:24,193 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:31:24,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:31:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:31:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:31:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:31:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 12:31:24,202 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-10-04 12:31:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:24,203 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 12:31:24,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:31:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 12:31:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:31:24,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:24,204 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-10-04 12:31:24,204 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:24,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-10-04 12:31:24,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:24,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:24,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:24,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:24,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:24,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:24,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:24,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:24,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:24,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:24,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:31:24,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:31:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:31:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:31:24,789 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-10-04 12:31:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:24,837 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-10-04 12:31:24,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:31:24,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-10-04 12:31:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:24,838 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:31:24,838 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:31:24,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:31:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:31:24,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:31:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:31:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 12:31:24,842 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-04 12:31:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:24,843 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 12:31:24,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:31:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 12:31:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:31:24,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:24,844 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-10-04 12:31:24,844 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:24,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-10-04 12:31:24,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:24,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:24,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:24,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:24,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:25,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:25,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:25,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:25,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:25,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:25,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:31:25,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:31:25,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:31:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:31:25,194 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-10-04 12:31:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:25,255 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-10-04 12:31:25,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:31:25,255 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-10-04 12:31:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:25,256 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:31:25,257 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:31:25,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:31:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:31:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:31:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:31:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-04 12:31:25,261 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-10-04 12:31:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:25,261 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-04 12:31:25,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:31:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-04 12:31:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:31:25,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:25,262 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-10-04 12:31:25,262 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:25,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-10-04 12:31:25,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:25,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:25,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:25,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:25,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:25,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:25,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:25,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:25,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:25,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:25,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:25,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:25,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:31:25,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:31:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:31:25,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:31:25,554 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-10-04 12:31:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:25,599 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-10-04 12:31:25,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:31:25,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-10-04 12:31:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:25,600 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:31:25,600 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:31:25,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:31:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:31:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:31:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:31:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 12:31:25,604 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 12:31:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:25,604 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 12:31:25,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:31:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 12:31:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:31:25,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:25,605 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-10-04 12:31:25,605 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:25,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-10-04 12:31:25,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:25,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:25,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:25,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:25,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:25,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:25,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:25,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:26,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:26,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:26,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:26,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:26,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:31:26,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:31:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:31:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:31:26,036 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-10-04 12:31:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:26,114 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-10-04 12:31:26,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:31:26,115 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-10-04 12:31:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:26,116 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:31:26,116 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:31:26,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:31:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:31:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:31:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:31:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 12:31:26,120 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-10-04 12:31:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:26,120 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 12:31:26,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:31:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 12:31:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:31:26,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:26,121 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-10-04 12:31:26,122 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:26,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-10-04 12:31:26,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:26,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:26,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:26,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:26,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:26,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:26,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:26,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:26,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 12:31:26,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:26,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:26,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:26,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 12:31:26,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:31:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:31:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:31:26,997 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-10-04 12:31:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:28,135 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-10-04 12:31:28,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:31:28,135 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-10-04 12:31:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:28,136 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:31:28,136 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:31:28,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:31:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:31:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:31:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:31:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 12:31:28,142 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-10-04 12:31:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:28,142 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 12:31:28,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:31:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 12:31:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:31:28,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:28,143 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-10-04 12:31:28,143 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:28,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-10-04 12:31:28,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:28,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:28,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:28,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:28,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:29,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:29,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:29,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:29,104 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:29,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:29,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:29,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:29,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 12:31:29,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:31:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:31:29,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:31:29,890 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-10-04 12:31:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:31,167 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-10-04 12:31:31,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:31:31,168 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-10-04 12:31:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:31,168 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:31:31,169 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:31:31,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:31:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:31:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:31:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:31:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 12:31:31,175 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-10-04 12:31:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:31,176 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 12:31:31,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:31:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 12:31:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:31:31,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:31,177 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-10-04 12:31:31,177 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:31,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-10-04 12:31:31,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:31,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:31,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:31,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:31,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:31,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:31,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:31,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:31,527 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:31:31,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:31,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:31,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:31,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:31:31,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:31:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:31:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:31:31,572 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-10-04 12:31:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:31,679 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-10-04 12:31:31,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:31:31,679 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-10-04 12:31:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:31,680 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:31:31,680 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:31:31,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:31:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:31:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:31:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:31:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-04 12:31:31,685 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-04 12:31:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:31,685 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-04 12:31:31,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:31:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-04 12:31:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:31:31,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:31,686 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-10-04 12:31:31,686 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:31,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-10-04 12:31:31,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:31,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:31,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:31,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:31,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:32,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:32,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:32,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:32,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 12:31:32,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:32,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:32,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:32,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:31:32,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:31:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:31:32,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:31:32,294 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-10-04 12:31:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:32,397 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-10-04 12:31:32,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:31:32,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-10-04 12:31:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:32,398 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:31:32,399 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:31:32,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:31:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:31:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:31:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:31:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-04 12:31:32,403 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-10-04 12:31:32,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:32,403 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-04 12:31:32,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:31:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-04 12:31:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:31:32,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:32,404 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-10-04 12:31:32,404 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:32,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-10-04 12:31:32,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:32,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:32,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:32,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:32,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:32,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:32,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:32,878 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:32,921 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 12:31:32,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:32,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:33,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:33,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 12:31:33,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:31:33,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:31:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:31:33,450 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-10-04 12:31:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:35,056 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-10-04 12:31:35,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:31:35,057 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-10-04 12:31:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:35,058 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:31:35,058 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 12:31:35,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:31:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 12:31:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 12:31:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:31:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 12:31:35,063 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-10-04 12:31:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:35,064 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 12:31:35,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:31:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 12:31:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:31:35,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:35,064 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-10-04 12:31:35,064 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:35,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-10-04 12:31:35,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:35,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:35,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:35,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:35,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:35,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:35,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:35,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:35,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:35,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:35,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:31:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:31:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:31:35,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:31:35,582 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-10-04 12:31:35,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:35,655 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-04 12:31:35,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:31:35,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-10-04 12:31:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:35,657 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:31:35,657 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:31:35,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:31:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:31:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:31:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:31:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-04 12:31:35,661 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-04 12:31:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:35,662 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-04 12:31:35,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:31:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-04 12:31:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:31:35,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:35,662 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-10-04 12:31:35,663 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:35,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-10-04 12:31:35,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:35,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:35,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:35,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:35,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:36,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:36,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:36,048 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:36,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:36,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:36,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:36,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:36,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:31:36,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:31:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:31:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:31:36,107 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-10-04 12:31:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:36,169 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-10-04 12:31:36,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:31:36,170 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-10-04 12:31:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:36,171 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:31:36,171 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:31:36,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:31:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:31:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:31:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:31:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 12:31:36,175 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-10-04 12:31:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:36,175 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 12:31:36,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:31:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 12:31:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:31:36,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:36,176 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-10-04 12:31:36,176 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:36,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-10-04 12:31:36,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:36,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:36,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:36,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:36,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:36,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:36,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:36,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:36,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:36,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:36,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:36,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:36,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:31:36,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:31:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:31:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:31:36,631 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-10-04 12:31:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:36,704 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-10-04 12:31:36,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:31:36,704 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-10-04 12:31:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:36,705 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:31:36,705 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:31:36,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:31:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:31:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:31:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:31:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 12:31:36,709 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 12:31:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:36,709 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 12:31:36,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:31:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 12:31:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:31:36,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:36,710 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-10-04 12:31:36,710 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:36,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-10-04 12:31:36,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:36,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:36,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:36,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:36,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:37,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:37,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:37,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:37,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:31:37,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:37,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:37,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:37,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:31:37,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:31:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:31:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:31:37,545 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-10-04 12:31:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:37,591 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-10-04 12:31:37,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:31:37,592 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-10-04 12:31:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:37,593 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:31:37,593 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:31:37,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:31:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:31:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 12:31:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:31:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 12:31:37,596 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-10-04 12:31:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:37,597 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 12:31:37,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:31:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 12:31:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:31:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:37,597 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-10-04 12:31:37,597 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:37,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-10-04 12:31:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:37,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:37,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:38,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:38,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:38,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:38,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-04 12:31:38,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:38,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:38,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:38,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 12:31:38,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:31:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:31:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:31:38,717 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-10-04 12:31:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:40,761 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-10-04 12:31:40,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:31:40,761 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-10-04 12:31:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:40,763 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:31:40,763 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:31:40,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-10-04 12:31:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:31:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:31:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:31:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 12:31:40,768 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 12:31:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:40,768 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 12:31:40,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:31:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 12:31:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:31:40,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:40,768 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-10-04 12:31:40,769 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:40,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-10-04 12:31:40,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:40,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:40,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:40,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:40,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:41,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:41,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:41,169 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:41,197 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:41,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:41,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:41,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:41,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:31:41,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:31:41,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:31:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:31:41,232 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-10-04 12:31:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:41,334 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-10-04 12:31:41,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:31:41,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-10-04 12:31:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:41,336 INFO L225 Difference]: With dead ends: 96 [2018-10-04 12:31:41,336 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:31:41,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:31:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:31:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 12:31:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:31:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 12:31:41,340 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 12:31:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 12:31:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:31:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 12:31:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:31:41,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:41,340 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-10-04 12:31:41,341 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:41,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-10-04 12:31:41,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:41,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:41,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:41,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:41,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:41,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:41,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:41,922 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-04 12:31:41,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:41,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:41,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:41,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:31:41,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:31:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:31:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:31:41,973 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-10-04 12:31:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:42,304 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-10-04 12:31:42,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:31:42,304 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-10-04 12:31:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:42,305 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:31:42,305 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:31:42,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:31:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:31:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 12:31:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:31:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 12:31:42,311 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-10-04 12:31:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:42,311 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 12:31:42,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:31:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 12:31:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:31:42,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:42,312 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-10-04 12:31:42,313 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:42,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-10-04 12:31:42,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:42,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:42,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:42,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:42,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:42,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:42,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:42,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:42,800 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:31:42,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:42,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:42,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:42,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:31:42,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:31:42,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:31:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:31:42,835 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-10-04 12:31:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:42,935 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-10-04 12:31:42,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:31:42,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-10-04 12:31:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:42,936 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:31:42,937 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:31:42,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:31:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:31:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:31:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:31:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 12:31:42,942 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-04 12:31:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:42,943 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 12:31:42,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:31:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 12:31:42,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:31:42,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:42,944 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-10-04 12:31:42,944 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:42,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-10-04 12:31:42,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:42,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:42,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:43,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:43,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:43,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:43,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:43,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:43,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:31:43,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:31:43,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:31:43,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:31:43,718 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-10-04 12:31:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:43,837 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-10-04 12:31:43,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:31:43,837 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-10-04 12:31:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:43,839 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:31:43,839 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:31:43,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:31:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:31:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:31:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:31:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-04 12:31:43,844 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-10-04 12:31:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:43,845 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-04 12:31:43,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:31:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-04 12:31:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 12:31:43,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:43,846 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-10-04 12:31:43,846 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:43,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-10-04 12:31:43,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:43,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:43,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:43,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:43,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:44,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:44,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:44,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:44,602 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 12:31:44,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:44,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:45,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:45,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 12:31:45,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:31:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:31:45,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:31:45,721 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-10-04 12:31:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:47,761 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-10-04 12:31:47,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:31:47,762 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-10-04 12:31:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:47,763 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:31:47,763 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 12:31:47,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-10-04 12:31:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 12:31:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 12:31:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:31:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 12:31:47,769 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-10-04 12:31:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:47,770 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 12:31:47,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:31:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 12:31:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:31:47,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:47,771 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-10-04 12:31:47,771 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:47,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-10-04 12:31:47,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:47,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:47,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:47,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:47,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:48,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:48,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:48,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:48,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:48,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:48,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:31:48,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:31:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:31:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:31:48,343 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-10-04 12:31:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:48,625 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-10-04 12:31:48,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:31:48,625 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-10-04 12:31:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:48,626 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:31:48,626 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:31:48,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:31:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:31:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:31:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:31:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 12:31:48,631 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-04 12:31:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:48,631 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 12:31:48,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:31:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 12:31:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:31:48,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:48,632 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-10-04 12:31:48,632 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:48,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-10-04 12:31:48,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:48,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:48,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:48,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:48,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:49,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:49,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:49,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:49,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:49,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:49,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:49,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:49,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:31:49,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:31:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:31:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:31:49,745 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-10-04 12:31:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:49,876 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-10-04 12:31:49,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:31:49,877 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-10-04 12:31:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:49,877 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:31:49,877 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:31:49,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:31:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:31:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:31:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:31:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-04 12:31:49,882 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-10-04 12:31:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:49,883 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-04 12:31:49,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:31:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-04 12:31:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:31:49,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:49,884 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-10-04 12:31:49,884 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:49,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-10-04 12:31:49,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:49,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:49,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:49,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:49,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:50,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:50,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:50,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:50,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:50,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:50,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:50,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:50,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:31:50,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:31:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:31:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:31:50,682 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-10-04 12:31:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:50,851 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-10-04 12:31:50,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:31:50,852 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-10-04 12:31:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:50,853 INFO L225 Difference]: With dead ends: 108 [2018-10-04 12:31:50,853 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:31:50,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:31:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:31:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 12:31:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:31:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 12:31:50,860 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 12:31:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:50,860 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 12:31:50,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:31:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 12:31:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:31:50,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:50,861 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-10-04 12:31:50,861 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:50,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-10-04 12:31:50,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:50,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:50,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:50,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:50,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:51,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:51,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:51,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:51,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:31:51,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:51,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:51,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:51,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:31:51,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:31:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:31:51,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:31:51,897 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-10-04 12:31:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:52,049 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-10-04 12:31:52,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:31:52,049 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-10-04 12:31:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:52,050 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:31:52,051 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 12:31:52,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:31:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 12:31:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 12:31:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:31:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 12:31:52,055 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-10-04 12:31:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:52,056 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 12:31:52,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:31:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 12:31:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:31:52,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:52,057 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-10-04 12:31:52,057 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:52,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-10-04 12:31:52,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:52,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:52,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:52,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:52,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:52,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:52,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:52,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:52,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-04 12:31:52,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:52,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:53,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:53,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 12:31:53,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:31:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:31:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:31:53,637 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-10-04 12:31:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:56,233 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-10-04 12:31:56,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:31:56,233 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-10-04 12:31:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:56,234 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:31:56,234 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:31:56,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-10-04 12:31:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:31:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:31:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:31:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-04 12:31:56,240 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-10-04 12:31:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:56,240 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-04 12:31:56,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:31:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-04 12:31:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:31:56,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:56,241 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-10-04 12:31:56,241 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:56,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:56,242 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-10-04 12:31:56,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:56,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:56,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:56,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:56,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:56,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:56,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:56,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:56,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:56,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:56,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:56,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:31:56,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:31:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:31:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:31:56,920 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-10-04 12:31:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:57,141 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-10-04 12:31:57,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:31:57,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-10-04 12:31:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:57,142 INFO L225 Difference]: With dead ends: 114 [2018-10-04 12:31:57,142 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:31:57,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:31:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:31:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 12:31:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 12:31:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 12:31:57,150 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 12:31:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:57,150 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 12:31:57,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:31:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 12:31:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:31:57,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:57,151 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-10-04 12:31:57,151 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:57,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:57,151 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-10-04 12:31:57,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:57,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:57,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:57,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:57,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:59,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:59,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:59,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:59,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:59,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:59,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:59,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:59,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:31:59,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:31:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:31:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:31:59,269 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-10-04 12:31:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:59,328 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 12:31:59,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:31:59,329 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-10-04 12:31:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:59,329 INFO L225 Difference]: With dead ends: 116 [2018-10-04 12:31:59,330 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 12:31:59,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:31:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 12:31:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 12:31:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 12:31:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 12:31:59,334 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 12:31:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:59,334 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 12:31:59,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:31:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 12:31:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:31:59,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:59,335 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-10-04 12:31:59,335 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:59,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-10-04 12:31:59,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:59,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:59,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:59,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:01,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:01,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:01,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:01,183 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:32:01,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:01,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:01,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:01,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:32:01,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:32:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:32:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:32:01,226 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-10-04 12:32:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:01,315 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-10-04 12:32:01,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:32:01,316 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-10-04 12:32:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:01,317 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:32:01,317 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:32:01,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:32:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:32:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:32:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:32:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-04 12:32:01,321 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-04 12:32:01,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:01,321 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-04 12:32:01,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:32:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-04 12:32:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:32:01,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:01,322 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-10-04 12:32:01,322 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:01,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-10-04 12:32:01,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:01,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:01,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:01,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:01,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:02,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:02,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:02,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:02,315 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:32:02,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:02,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:02,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:02,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:32:02,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:32:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:32:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:32:02,353 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-10-04 12:32:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:02,441 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-10-04 12:32:02,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:32:02,442 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-10-04 12:32:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:02,443 INFO L225 Difference]: With dead ends: 119 [2018-10-04 12:32:02,443 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:32:02,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:32:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:32:02,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:32:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:32:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 12:32:02,447 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-10-04 12:32:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:02,448 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 12:32:02,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:32:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 12:32:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 12:32:02,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:02,448 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-10-04 12:32:02,449 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:02,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-10-04 12:32:02,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:02,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:02,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:03,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:03,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:03,116 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:03,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 12:32:03,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:03,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:04,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 12:32:04,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:32:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:32:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:32:04,316 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-10-04 12:32:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:07,330 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-10-04 12:32:07,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:32:07,331 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-10-04 12:32:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:07,332 INFO L225 Difference]: With dead ends: 122 [2018-10-04 12:32:07,332 INFO L226 Difference]: Without dead ends: 118 [2018-10-04 12:32:07,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-10-04 12:32:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-04 12:32:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-04 12:32:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-04 12:32:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-04 12:32:07,338 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-10-04 12:32:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:07,338 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-04 12:32:07,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:32:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-04 12:32:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:32:07,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:07,339 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-10-04 12:32:07,339 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:07,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-10-04 12:32:07,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:07,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:07,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:07,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:07,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:10,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:10,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:10,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:10,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:10,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:10,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:32:10,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:32:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:32:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:32:10,240 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-10-04 12:32:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:10,448 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-10-04 12:32:10,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:32:10,448 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-10-04 12:32:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:10,449 INFO L225 Difference]: With dead ends: 123 [2018-10-04 12:32:10,450 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:32:10,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:32:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:32:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:32:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:32:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 12:32:10,455 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-04 12:32:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:10,455 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 12:32:10,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:32:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 12:32:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:32:10,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:10,456 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-10-04 12:32:10,456 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:10,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:10,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-10-04 12:32:10,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:10,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:10,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:10,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:10,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:12,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:12,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:12,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-04 12:32:12,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:12,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:12,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:32:12,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:32:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:32:12,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:32:12,488 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-10-04 12:32:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:12,714 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-10-04 12:32:12,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:32:12,715 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-10-04 12:32:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:12,716 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:32:12,716 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:32:12,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:32:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:32:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:32:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:32:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 12:32:12,721 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-10-04 12:32:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:12,721 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 12:32:12,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:32:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 12:32:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 12:32:12,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:12,722 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-10-04 12:32:12,723 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:12,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:12,723 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-10-04 12:32:12,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:12,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:13,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:13,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:13,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:13,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:13,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:13,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:13,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:13,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:32:13,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:32:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:32:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:32:13,549 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-10-04 12:32:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:13,661 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-10-04 12:32:13,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:32:13,661 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-10-04 12:32:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:13,662 INFO L225 Difference]: With dead ends: 126 [2018-10-04 12:32:13,662 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 12:32:13,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:32:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 12:32:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-04 12:32:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 12:32:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 12:32:13,667 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-04 12:32:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:13,667 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 12:32:13,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:32:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 12:32:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-04 12:32:13,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:13,668 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-10-04 12:32:13,668 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:13,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-10-04 12:32:13,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:13,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:13,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:13,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:13,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:14,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:14,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:14,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:14,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:14,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:14,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:32:14,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:32:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:32:14,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:32:14,618 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-10-04 12:32:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:14,726 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-10-04 12:32:14,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:32:14,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-10-04 12:32:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:14,727 INFO L225 Difference]: With dead ends: 128 [2018-10-04 12:32:14,727 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 12:32:14,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:32:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 12:32:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-04 12:32:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-04 12:32:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-04 12:32:14,730 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-10-04 12:32:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:14,731 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-04 12:32:14,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:32:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-04 12:32:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:32:14,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:14,732 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-10-04 12:32:14,732 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:14,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-10-04 12:32:14,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:14,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:14,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:14,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:14,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:15,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:15,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:15,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:15,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-04 12:32:15,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:15,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:17,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:17,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 12:32:17,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:32:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:32:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:32:17,259 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-10-04 12:32:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:20,441 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-10-04 12:32:20,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:32:20,442 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-10-04 12:32:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:20,443 INFO L225 Difference]: With dead ends: 131 [2018-10-04 12:32:20,443 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:32:20,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-10-04 12:32:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:32:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 12:32:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:32:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-04 12:32:20,449 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-10-04 12:32:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:20,449 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-04 12:32:20,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:32:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-04 12:32:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 12:32:20,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:20,450 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-10-04 12:32:20,450 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:20,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-10-04 12:32:20,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:20,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:20,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:21,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:21,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:21,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:21,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:21,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:21,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:32:21,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:32:21,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:32:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:32:21,524 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-10-04 12:32:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:21,600 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-10-04 12:32:21,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:32:21,600 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-10-04 12:32:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:21,601 INFO L225 Difference]: With dead ends: 132 [2018-10-04 12:32:21,601 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 12:32:21,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:32:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 12:32:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-04 12:32:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-04 12:32:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-10-04 12:32:21,606 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-10-04 12:32:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:21,606 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-10-04 12:32:21,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:32:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-10-04 12:32:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-04 12:32:21,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:21,607 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-10-04 12:32:21,608 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:21,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:21,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-10-04 12:32:21,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:21,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:21,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:21,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:21,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:22,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:22,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:22,324 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:22,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:22,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:22,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:22,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:22,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:32:22,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:32:22,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:32:22,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:32:22,421 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-10-04 12:32:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:23,957 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-10-04 12:32:23,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:32:23,957 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-10-04 12:32:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:23,958 INFO L225 Difference]: With dead ends: 134 [2018-10-04 12:32:23,958 INFO L226 Difference]: Without dead ends: 130 [2018-10-04 12:32:23,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:32:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-04 12:32:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-04 12:32:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 12:32:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-04 12:32:23,962 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-10-04 12:32:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:23,963 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-04 12:32:23,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:32:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-04 12:32:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:32:23,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:23,964 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-10-04 12:32:23,964 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:23,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-10-04 12:32:23,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:23,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:23,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:23,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:23,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:25,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:25,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:25,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:25,883 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 12:32:25,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:25,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:25,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:25,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:32:25,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:32:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:32:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:32:25,941 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-10-04 12:32:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:26,718 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-10-04 12:32:26,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:32:26,719 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-10-04 12:32:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:26,719 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:32:26,719 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:32:26,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:32:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:32:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:32:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:32:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 12:32:26,722 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-04 12:32:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:26,722 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 12:32:26,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:32:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 12:32:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:32:26,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:26,723 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-10-04 12:32:26,724 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:26,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-10-04 12:32:26,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:26,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:26,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:26,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:26,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:27,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:27,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:27,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-10-04 12:32:27,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:27,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:27,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:32:27,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:32:27,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:32:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:32:27,684 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-10-04 12:32:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:27,810 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-10-04 12:32:27,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:32:27,811 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-10-04 12:32:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:27,812 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:32:27,812 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:32:27,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:32:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:32:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 12:32:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:32:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 12:32:27,816 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 12:32:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:27,816 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 12:32:27,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:32:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 12:32:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-04 12:32:27,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:27,817 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-10-04 12:32:27,817 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:27,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:27,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-10-04 12:32:27,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:27,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:27,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:27,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:27,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:28,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:28,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:28,528 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:28,621 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-04 12:32:28,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:28,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:30,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:30,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 12:32:30,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:32:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:32:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:32:30,207 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-10-04 12:32:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:34,055 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-10-04 12:32:34,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:32:34,056 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-10-04 12:32:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:34,057 INFO L225 Difference]: With dead ends: 140 [2018-10-04 12:32:34,057 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 12:32:34,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-10-04 12:32:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 12:32:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 12:32:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 12:32:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 12:32:34,061 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-10-04 12:32:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:34,062 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 12:32:34,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:32:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 12:32:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:32:34,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:34,062 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-10-04 12:32:34,063 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:34,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-10-04 12:32:34,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:34,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:34,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:34,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:34,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:34,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:34,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:34,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:34,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:34,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:34,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:32:34,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:32:34,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:32:34,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:32:34,894 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-10-04 12:32:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:34,999 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-10-04 12:32:34,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:32:34,999 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-10-04 12:32:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:35,000 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:32:35,000 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:32:35,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:32:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:32:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 12:32:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 12:32:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-04 12:32:35,005 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-04 12:32:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:35,005 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-04 12:32:35,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:32:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-04 12:32:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:32:35,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:35,006 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-10-04 12:32:35,006 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:35,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-10-04 12:32:35,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:35,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:35,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:35,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:36,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:36,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:36,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:36,408 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:36,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:36,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:36,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:36,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:32:36,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:32:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:32:36,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:32:36,450 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-10-04 12:32:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:36,518 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-10-04 12:32:36,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:32:36,522 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-10-04 12:32:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:36,523 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:32:36,523 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:32:36,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:32:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:32:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 12:32:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:32:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-04 12:32:36,528 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-10-04 12:32:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:36,528 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-04 12:32:36,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:32:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-04 12:32:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 12:32:36,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:36,529 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-10-04 12:32:36,529 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:36,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-10-04 12:32:36,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:36,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:36,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:36,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:36,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:37,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:37,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:37,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:37,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:37,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:37,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:37,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:37,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:32:37,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:32:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:32:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:32:37,448 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-10-04 12:32:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:37,702 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-10-04 12:32:37,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:32:37,702 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-10-04 12:32:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:37,703 INFO L225 Difference]: With dead ends: 144 [2018-10-04 12:32:37,703 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 12:32:37,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:32:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 12:32:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-04 12:32:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 12:32:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-04 12:32:37,708 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-10-04 12:32:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:37,709 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-04 12:32:37,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:32:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-04 12:32:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 12:32:37,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:37,710 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-10-04 12:32:37,710 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:37,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:37,710 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-10-04 12:32:37,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:37,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:37,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:37,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:37,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:38,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:38,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:38,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:38,597 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 12:32:38,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:38,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:38,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:38,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:32:38,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:32:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:32:38,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:32:38,642 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-10-04 12:32:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:38,755 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-10-04 12:32:38,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:32:38,756 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-10-04 12:32:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:38,757 INFO L225 Difference]: With dead ends: 146 [2018-10-04 12:32:38,757 INFO L226 Difference]: Without dead ends: 142 [2018-10-04 12:32:38,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:32:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-04 12:32:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-04 12:32:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-04 12:32:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-04 12:32:38,761 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-10-04 12:32:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:38,761 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-04 12:32:38,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:32:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-04 12:32:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:32:38,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:38,762 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-10-04 12:32:38,763 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:38,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-10-04 12:32:38,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:38,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:38,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:38,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:38,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:39,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:39,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:39,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:39,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-04 12:32:39,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:39,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:40,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:40,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:32:40,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:32:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:32:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:32:40,020 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-10-04 12:32:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:40,098 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-10-04 12:32:40,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:32:40,099 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-10-04 12:32:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:40,099 INFO L225 Difference]: With dead ends: 147 [2018-10-04 12:32:40,100 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:32:40,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:32:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:32:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 12:32:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:32:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 12:32:40,107 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-04 12:32:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:40,107 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 12:32:40,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:32:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 12:32:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:32:40,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:40,108 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-10-04 12:32:40,108 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:40,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:40,109 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-10-04 12:32:40,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:40,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:40,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:40,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:40,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:40,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:40,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:40,965 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:41,066 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-04 12:32:41,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:41,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:41,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:41,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:32:41,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:32:41,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:32:41,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:32:41,131 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-10-04 12:32:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:41,417 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-04 12:32:41,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:32:41,417 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-10-04 12:32:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:41,418 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:32:41,419 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 12:32:41,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:32:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 12:32:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 12:32:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:32:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 12:32:41,425 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-10-04 12:32:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:41,425 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 12:32:41,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:32:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 12:32:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 12:32:41,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:41,426 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-10-04 12:32:41,426 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:41,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-10-04 12:32:41,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:41,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:41,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:41,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:41,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:42,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:42,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:42,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:42,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:42,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:42,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:44,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:44,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 12:32:44,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:32:44,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:32:44,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:32:44,113 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-10-04 12:32:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:48,794 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-10-04 12:32:48,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:32:48,795 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-10-04 12:32:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:48,796 INFO L225 Difference]: With dead ends: 152 [2018-10-04 12:32:48,796 INFO L226 Difference]: Without dead ends: 148 [2018-10-04 12:32:48,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-10-04 12:32:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-04 12:32:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-04 12:32:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-04 12:32:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-10-04 12:32:48,801 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-10-04 12:32:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:48,802 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-10-04 12:32:48,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:32:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-10-04 12:32:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:32:48,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:48,802 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-10-04 12:32:48,803 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:48,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-10-04 12:32:48,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:48,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:48,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:48,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:48,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:49,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:49,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:49,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:49,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 12:32:49,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:49,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:49,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:49,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:32:49,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:32:49,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:32:49,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:32:49,941 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-10-04 12:32:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:50,083 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-10-04 12:32:50,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:32:50,084 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-10-04 12:32:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:50,085 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:32:50,085 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:32:50,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:32:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:32:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 12:32:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:32:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-04 12:32:50,089 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-04 12:32:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:50,090 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-04 12:32:50,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:32:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-04 12:32:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:32:50,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:50,090 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-10-04 12:32:50,091 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:50,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-10-04 12:32:50,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:50,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:50,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:50,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:50,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:50,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:50,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:50,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:51,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:51,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:51,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:32:51,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:32:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:32:51,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:32:51,061 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-10-04 12:32:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:51,197 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-10-04 12:32:51,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:32:51,197 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-10-04 12:32:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:51,198 INFO L225 Difference]: With dead ends: 155 [2018-10-04 12:32:51,199 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:32:51,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:32:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:32:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:32:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:32:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 12:32:51,202 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-10-04 12:32:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:51,203 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 12:32:51,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:32:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 12:32:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 12:32:51,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:51,203 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-10-04 12:32:51,204 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:51,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-10-04 12:32:51,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:51,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:51,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:51,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:51,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:52,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:52,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:52,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:52,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 12:32:52,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:52,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:54,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:54,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 12:32:54,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 12:32:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 12:32:54,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:32:54,276 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-10-04 12:32:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:58,932 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-10-04 12:32:58,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:32:58,933 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-10-04 12:32:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:58,934 INFO L225 Difference]: With dead ends: 158 [2018-10-04 12:32:58,934 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 12:32:58,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-10-04 12:32:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 12:32:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-04 12:32:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-04 12:32:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-10-04 12:32:58,940 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-10-04 12:32:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:58,940 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-10-04 12:32:58,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 12:32:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-10-04 12:32:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:32:58,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:58,941 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-10-04 12:32:58,941 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:58,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-10-04 12:32:58,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:58,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:58,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:58,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:58,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:59,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:59,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:59,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:59,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:59,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:59,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:32:59,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:32:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:32:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:32:59,975 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-10-04 12:33:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:00,109 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-10-04 12:33:00,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:33:00,110 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-10-04 12:33:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:00,111 INFO L225 Difference]: With dead ends: 159 [2018-10-04 12:33:00,111 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:33:00,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:33:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:33:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 12:33:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:33:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 12:33:00,116 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-04 12:33:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:00,116 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 12:33:00,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:33:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 12:33:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:33:00,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:00,117 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-10-04 12:33:00,118 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:00,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:00,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-10-04 12:33:00,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:00,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:00,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:00,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:00,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:01,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:01,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:01,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:01,363 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:01,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:01,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:01,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:01,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:33:01,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:33:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:33:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:33:01,409 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-10-04 12:33:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:01,536 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-10-04 12:33:01,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:33:01,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-10-04 12:33:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:01,537 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:33:01,537 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 12:33:01,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:33:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 12:33:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 12:33:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:33:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 12:33:01,541 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-10-04 12:33:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:01,541 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 12:33:01,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:33:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 12:33:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 12:33:01,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:01,542 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-10-04 12:33:01,542 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:01,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:01,543 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-10-04 12:33:01,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:01,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:01,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:01,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:01,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:02,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:02,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:02,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:02,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:02,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:02,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:02,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:02,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:33:02,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:33:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:33:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:33:02,871 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-10-04 12:33:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:03,007 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-10-04 12:33:03,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:33:03,007 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-10-04 12:33:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:03,009 INFO L225 Difference]: With dead ends: 162 [2018-10-04 12:33:03,009 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 12:33:03,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:33:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 12:33:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-04 12:33:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-04 12:33:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-10-04 12:33:03,012 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-10-04 12:33:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:03,013 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-10-04 12:33:03,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:33:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-10-04 12:33:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-04 12:33:03,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:03,013 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-10-04 12:33:03,014 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:03,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-10-04 12:33:03,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:03,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:03,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:03,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:03,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:04,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:04,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:04,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:04,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:33:04,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:04,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:04,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:04,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:33:04,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:33:04,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:33:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:33:04,210 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-10-04 12:33:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:04,348 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-10-04 12:33:04,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:33:04,348 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-10-04 12:33:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:04,349 INFO L225 Difference]: With dead ends: 164 [2018-10-04 12:33:04,349 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 12:33:04,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:33:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 12:33:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-04 12:33:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 12:33:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-04 12:33:04,354 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-10-04 12:33:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:04,354 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-04 12:33:04,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:33:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-04 12:33:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:33:04,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:04,355 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-10-04 12:33:04,356 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:04,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-10-04 12:33:04,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:04,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:04,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:04,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:04,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:05,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:05,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:05,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:05,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-04 12:33:05,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:05,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:07,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:07,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 12:33:07,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 12:33:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 12:33:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:33:07,888 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-10-04 12:33:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:13,237 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-10-04 12:33:13,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 12:33:13,237 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-10-04 12:33:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:13,239 INFO L225 Difference]: With dead ends: 167 [2018-10-04 12:33:13,239 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:33:13,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-10-04 12:33:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:33:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 12:33:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:33:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-04 12:33:13,245 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-10-04 12:33:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:13,245 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-04 12:33:13,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 12:33:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-04 12:33:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 12:33:13,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:13,246 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-10-04 12:33:13,246 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:13,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:13,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-10-04 12:33:13,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:13,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:13,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:13,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:13,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:14,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:14,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:14,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:14,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:14,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:14,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:14,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:14,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:33:14,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:33:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:33:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:33:14,392 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-10-04 12:33:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:14,528 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-10-04 12:33:14,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:33:14,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-10-04 12:33:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:14,530 INFO L225 Difference]: With dead ends: 168 [2018-10-04 12:33:14,530 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 12:33:14,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:33:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 12:33:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-04 12:33:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 12:33:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 12:33:14,533 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-10-04 12:33:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:14,533 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 12:33:14,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:33:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 12:33:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-04 12:33:14,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:14,534 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-10-04 12:33:14,534 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:14,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-10-04 12:33:14,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:14,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:14,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:14,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:15,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:15,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:15,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:15,672 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:15,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:15,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:15,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:15,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:33:15,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:33:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:33:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:15,717 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-10-04 12:33:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:15,862 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-10-04 12:33:15,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:33:15,862 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-10-04 12:33:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:15,863 INFO L225 Difference]: With dead ends: 170 [2018-10-04 12:33:15,863 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 12:33:15,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 12:33:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 12:33:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 12:33:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-04 12:33:15,869 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-10-04 12:33:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:15,869 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-04 12:33:15,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:33:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-04 12:33:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:33:15,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:15,870 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-10-04 12:33:15,870 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:15,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:15,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-10-04 12:33:15,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:15,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:15,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:15,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:15,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:17,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:17,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:17,344 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:17,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 12:33:17,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:17,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:17,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:17,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:33:17,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:33:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:33:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:17,499 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-10-04 12:33:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:17,596 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-10-04 12:33:17,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:33:17,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-10-04 12:33:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:17,598 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:33:17,598 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:33:17,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:33:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:33:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 12:33:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:33:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-04 12:33:17,603 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-04 12:33:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:17,603 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-04 12:33:17,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:33:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-04 12:33:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:33:17,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:17,604 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-10-04 12:33:17,605 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:17,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-10-04 12:33:17,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:17,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:17,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:17,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:17,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:18,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:18,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 12:33:18,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:18,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:19,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:19,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:33:19,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:33:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:33:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:33:19,059 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-10-04 12:33:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:19,360 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 12:33:19,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:33:19,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-10-04 12:33:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:19,361 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:33:19,361 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:33:19,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:33:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:33:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 12:33:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:33:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-04 12:33:19,365 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-10-04 12:33:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:19,366 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-04 12:33:19,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:33:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-04 12:33:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 12:33:19,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:19,367 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-10-04 12:33:19,367 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:19,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-10-04 12:33:19,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:19,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:19,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:19,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:20,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:20,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:20,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-04 12:33:20,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:20,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:23,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:23,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 12:33:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 12:33:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 12:33:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 12:33:23,245 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-10-04 12:33:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:29,207 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-10-04 12:33:29,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 12:33:29,207 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-10-04 12:33:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:29,209 INFO L225 Difference]: With dead ends: 176 [2018-10-04 12:33:29,209 INFO L226 Difference]: Without dead ends: 172 [2018-10-04 12:33:29,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-10-04 12:33:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-04 12:33:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-10-04 12:33:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-04 12:33:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-10-04 12:33:29,214 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-10-04 12:33:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:29,215 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-10-04 12:33:29,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 12:33:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-10-04 12:33:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:33:29,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:29,216 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-10-04 12:33:29,216 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:29,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-10-04 12:33:29,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:29,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:29,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:29,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:30,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:30,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:30,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:30,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:30,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:33:30,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:33:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:33:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:30,540 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-10-04 12:33:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:30,693 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-10-04 12:33:30,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:33:30,694 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-10-04 12:33:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:30,694 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:33:30,695 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:33:30,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:33:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 12:33:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 12:33:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-04 12:33:30,698 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-04 12:33:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:30,698 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-04 12:33:30,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:33:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-04 12:33:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:33:30,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:30,699 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-10-04 12:33:30,699 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:30,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-10-04 12:33:30,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:30,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:30,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:30,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:30,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:32,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:32,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:32,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:32,872 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-10-04 12:33:32,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:32,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:32,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:32,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:33:32,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:33:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:33:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:33:32,924 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-10-04 12:33:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:33,084 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-10-04 12:33:33,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:33:33,084 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-10-04 12:33:33,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:33,085 INFO L225 Difference]: With dead ends: 179 [2018-10-04 12:33:33,086 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:33:33,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:33:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:33:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 12:33:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:33:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 12:33:33,090 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 12:33:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:33,090 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 12:33:33,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:33:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 12:33:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 12:33:33,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:33,091 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-10-04 12:33:33,091 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:33,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:33,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-10-04 12:33:33,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:33,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:33,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:33,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:33,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:34,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:34,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:34,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:34,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:34,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:34,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:33:34,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:33:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:33:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:33:34,432 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-10-04 12:33:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:34,592 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-10-04 12:33:34,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:33:34,593 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-10-04 12:33:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:34,594 INFO L225 Difference]: With dead ends: 180 [2018-10-04 12:33:34,594 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 12:33:34,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:33:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 12:33:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-04 12:33:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-04 12:33:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-04 12:33:34,599 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-10-04 12:33:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:34,599 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-04 12:33:34,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:33:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-04 12:33:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 12:33:34,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:34,601 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-10-04 12:33:34,601 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:34,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-10-04 12:33:34,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:34,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:34,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:34,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:35,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:35,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:35,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:35,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:36,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:33:36,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:33:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:33:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:33:36,007 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-10-04 12:33:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:36,106 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-10-04 12:33:36,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:33:36,107 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-10-04 12:33:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:36,108 INFO L225 Difference]: With dead ends: 182 [2018-10-04 12:33:36,108 INFO L226 Difference]: Without dead ends: 178 [2018-10-04 12:33:36,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:33:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-04 12:33:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-10-04 12:33:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 12:33:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 12:33:36,114 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-10-04 12:33:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:36,114 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 12:33:36,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:33:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 12:33:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 12:33:36,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:36,115 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-10-04 12:33:36,116 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:36,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-10-04 12:33:36,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:36,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:36,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:36,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:36,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:37,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:37,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:37,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:37,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-04 12:33:37,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:37,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:40,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:40,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 12:33:40,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-04 12:33:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-04 12:33:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-10-04 12:33:40,252 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-10-04 12:33:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:46,709 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-10-04 12:33:46,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-04 12:33:46,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-10-04 12:33:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:46,711 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:33:46,711 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 12:33:46,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-10-04 12:33:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 12:33:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 12:33:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 12:33:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 12:33:46,717 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-10-04 12:33:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:46,718 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 12:33:46,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-04 12:33:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 12:33:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-04 12:33:46,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:46,719 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-10-04 12:33:46,719 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:46,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-10-04 12:33:46,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:46,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:46,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:46,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:46,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:48,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:48,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:48,357 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:48,408 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:48,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:48,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:48,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:48,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:33:48,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:33:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:33:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:33:48,462 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-10-04 12:33:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:48,563 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-10-04 12:33:48,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:33:48,564 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-10-04 12:33:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:48,565 INFO L225 Difference]: With dead ends: 186 [2018-10-04 12:33:48,565 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 12:33:48,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:33:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 12:33:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-10-04 12:33:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 12:33:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 12:33:48,569 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-10-04 12:33:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:48,569 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 12:33:48,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:33:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 12:33:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-04 12:33:48,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:48,570 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-10-04 12:33:48,570 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:48,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:48,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-10-04 12:33:48,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:48,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:48,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:48,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:48,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:50,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:50,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:50,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:50,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:50,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:50,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:50,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:50,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:33:50,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:33:50,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:33:50,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:50,145 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-10-04 12:33:50,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:50,334 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-10-04 12:33:50,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:33:50,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-10-04 12:33:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:50,335 INFO L225 Difference]: With dead ends: 188 [2018-10-04 12:33:50,335 INFO L226 Difference]: Without dead ends: 184 [2018-10-04 12:33:50,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-04 12:33:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-10-04 12:33:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-04 12:33:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-10-04 12:33:50,339 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-10-04 12:33:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:50,339 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-10-04 12:33:50,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:33:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-10-04 12:33:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:33:50,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:50,340 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-10-04 12:33:50,340 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:50,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-10-04 12:33:50,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:50,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:50,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:50,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:50,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:51,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:51,676 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 [2018-10-04 12:33:51,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:51,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-04 12:33:51,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:51,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:51,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:51,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:33:51,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:33:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:33:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:51,848 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-10-04 12:33:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:51,964 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-10-04 12:33:51,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:33:51,965 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-10-04 12:33:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:51,966 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:33:51,966 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 12:33:51,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 12:33:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 12:33:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:33:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 12:33:51,971 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-04 12:33:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:51,971 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 12:33:51,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:33:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 12:33:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:33:51,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:51,972 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-10-04 12:33:51,972 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:51,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-10-04 12:33:51,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:51,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:51,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:51,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:51,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:53,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:53,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:53,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:53,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-10-04 12:33:53,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:53,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:53,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:53,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:33:53,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:33:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:33:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:33:53,828 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-10-04 12:33:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:54,004 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-10-04 12:33:54,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:33:54,005 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-10-04 12:33:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:54,006 INFO L225 Difference]: With dead ends: 191 [2018-10-04 12:33:54,006 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:33:54,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:33:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:33:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 12:33:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:33:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-04 12:33:54,010 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-10-04 12:33:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:54,010 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-04 12:33:54,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:33:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-04 12:33:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-04 12:33:54,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:54,011 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-10-04 12:33:54,011 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:54,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-10-04 12:33:54,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:54,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:54,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:54,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:54,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:55,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:55,463 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 [2018-10-04 12:33:55,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:55,590 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-04 12:33:55,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:55,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:58,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:58,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 12:33:58,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-04 12:33:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-04 12:33:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 12:33:58,591 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-10-04 12:34:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:05,663 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-10-04 12:34:05,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-04 12:34:05,664 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-10-04 12:34:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:05,665 INFO L225 Difference]: With dead ends: 194 [2018-10-04 12:34:05,665 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 12:34:05,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-10-04 12:34:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 12:34:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-10-04 12:34:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-04 12:34:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-04 12:34:05,670 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-10-04 12:34:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:05,671 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-04 12:34:05,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-04 12:34:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-04 12:34:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:34:05,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:05,671 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-10-04 12:34:05,672 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:05,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-10-04 12:34:05,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:05,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:05,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:05,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:05,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:07,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:07,153 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 [2018-10-04 12:34:07,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:07,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:07,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:07,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:34:07,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:34:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:34:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:34:07,270 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-10-04 12:34:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:07,459 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-10-04 12:34:07,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:34:07,459 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-10-04 12:34:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:07,460 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:34:07,460 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:34:07,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:34:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:34:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:34:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:34:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 12:34:07,465 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-04 12:34:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:07,465 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 12:34:07,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:34:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 12:34:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:34:07,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:07,466 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-10-04 12:34:07,467 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:07,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:07,467 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-10-04 12:34:07,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:07,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:07,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:07,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:09,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:09,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:09,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:09,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:09,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:09,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:09,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:09,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:34:09,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:34:09,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:34:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:34:09,387 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-10-04 12:34:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:09,566 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-10-04 12:34:09,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:34:09,566 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-10-04 12:34:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:09,567 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:34:09,567 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 12:34:09,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:34:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 12:34:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 12:34:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 12:34:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-04 12:34:09,572 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-10-04 12:34:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:09,572 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-04 12:34:09,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:34:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-04 12:34:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 12:34:09,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:09,573 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-10-04 12:34:09,573 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:09,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:09,574 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-10-04 12:34:09,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:09,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:09,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:09,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:09,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:11,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:11,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:34:11,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:11,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:11,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:11,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:11,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:11,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:34:11,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:34:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:34:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:34:11,244 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-10-04 12:34:11,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:11,402 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-10-04 12:34:11,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:34:11,403 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-10-04 12:34:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:11,404 INFO L225 Difference]: With dead ends: 198 [2018-10-04 12:34:11,404 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 12:34:11,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:34:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 12:34:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-10-04 12:34:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-04 12:34:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-10-04 12:34:11,408 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-10-04 12:34:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:11,408 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-10-04 12:34:11,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:34:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-10-04 12:34:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 12:34:11,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:11,409 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-10-04 12:34:11,409 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:11,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-10-04 12:34:11,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:11,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:11,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:11,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:13,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:13,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:13,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:13,237 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-04 12:34:13,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:13,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:13,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:13,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:34:13,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:34:13,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:34:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:34:13,295 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-10-04 12:34:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:13,530 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-10-04 12:34:13,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:34:13,531 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-10-04 12:34:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:13,531 INFO L225 Difference]: With dead ends: 200 [2018-10-04 12:34:13,531 INFO L226 Difference]: Without dead ends: 196 [2018-10-04 12:34:13,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:34:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-04 12:34:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-04 12:34:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 12:34:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-04 12:34:13,536 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-10-04 12:34:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:13,536 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-04 12:34:13,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:34:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-04 12:34:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:34:13,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:13,538 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-10-04 12:34:13,538 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:13,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:13,538 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-10-04 12:34:13,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:13,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:13,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:13,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:13,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:15,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:15,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:15,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:15,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-04 12:34:15,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:15,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:18,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:18,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-04 12:34:18,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-04 12:34:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-04 12:34:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-10-04 12:34:18,203 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-10-04 12:34:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:26,037 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-10-04 12:34:26,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-04 12:34:26,037 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-10-04 12:34:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:26,038 INFO L225 Difference]: With dead ends: 203 [2018-10-04 12:34:26,038 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 12:34:26,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-10-04 12:34:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 12:34:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 12:34:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 12:34:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-04 12:34:26,042 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-10-04 12:34:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:26,042 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-04 12:34:26,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-04 12:34:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-04 12:34:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 12:34:26,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:26,043 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-10-04 12:34:26,043 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:26,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:26,044 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-10-04 12:34:26,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:26,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:26,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:26,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:26,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:27,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:27,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:27,732 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:27,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:27,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:27,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:27,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:27,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:34:27,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:34:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:34:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:34:27,867 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-10-04 12:34:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:27,979 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-10-04 12:34:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:34:27,980 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-10-04 12:34:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:27,980 INFO L225 Difference]: With dead ends: 204 [2018-10-04 12:34:27,980 INFO L226 Difference]: Without dead ends: 200 [2018-10-04 12:34:27,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:34:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-04 12:34:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-04 12:34:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-04 12:34:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-04 12:34:27,988 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-10-04 12:34:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:27,988 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-04 12:34:27,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:34:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-04 12:34:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 12:34:27,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:27,989 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-10-04 12:34:27,989 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:27,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-10-04 12:34:27,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:27,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:27,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:27,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:27,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:29,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:29,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:29,865 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:29,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-10-04 12:34:29,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:29,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:30,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:30,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:34:30,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:34:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:34:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:34:30,049 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-10-04 12:34:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:30,226 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-10-04 12:34:30,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:34:30,227 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-10-04 12:34:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:30,228 INFO L225 Difference]: With dead ends: 206 [2018-10-04 12:34:30,228 INFO L226 Difference]: Without dead ends: 202 [2018-10-04 12:34:30,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:34:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-04 12:34:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-10-04 12:34:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-04 12:34:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-10-04 12:34:30,232 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-10-04 12:34:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:30,232 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-10-04 12:34:30,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:34:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-10-04 12:34:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 12:34:30,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:30,233 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-10-04 12:34:30,233 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:30,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-10-04 12:34:30,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:30,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:30,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:30,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:30,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:31,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:31,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:31,851 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:31,979 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-04 12:34:31,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:31,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:32,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:32,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:34:32,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:34:32,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:34:32,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:34:32,039 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-10-04 12:34:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:32,213 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-10-04 12:34:32,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:34:32,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-10-04 12:34:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:32,214 INFO L225 Difference]: With dead ends: 207 [2018-10-04 12:34:32,214 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 12:34:32,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:34:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 12:34:32,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 12:34:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 12:34:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-04 12:34:32,218 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-04 12:34:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:32,218 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-04 12:34:32,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:34:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-04 12:34:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 12:34:32,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:32,219 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-10-04 12:34:32,219 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:32,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-10-04 12:34:32,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:32,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:32,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:32,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:32,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:34,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:34,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:34,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:34,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:34,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:34,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:34:34,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:34:34,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:34:34,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:34:34,303 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-10-04 12:34:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:34,463 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-10-04 12:34:34,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:34:34,463 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-10-04 12:34:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:34,464 INFO L225 Difference]: With dead ends: 209 [2018-10-04 12:34:34,464 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 12:34:34,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:34:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 12:34:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 12:34:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 12:34:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 12:34:34,469 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-10-04 12:34:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:34,470 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 12:34:34,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:34:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 12:34:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 12:34:34,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:34,471 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-10-04 12:34:34,471 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:34,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-10-04 12:34:34,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:34,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:34,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:34,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:34,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:36,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:36,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:36,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:36,286 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-04 12:34:36,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:36,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:39,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:39,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-04 12:34:39,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-04 12:34:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-04 12:34:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 12:34:39,915 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-10-04 12:34:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:48,228 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-10-04 12:34:48,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-04 12:34:48,229 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-10-04 12:34:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:48,230 INFO L225 Difference]: With dead ends: 212 [2018-10-04 12:34:48,230 INFO L226 Difference]: Without dead ends: 208 [2018-10-04 12:34:48,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-10-04 12:34:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-04 12:34:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-10-04 12:34:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-04 12:34:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-10-04 12:34:48,235 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-10-04 12:34:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:48,235 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-10-04 12:34:48,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-04 12:34:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-10-04 12:34:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 12:34:48,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:48,236 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-10-04 12:34:48,236 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:48,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-10-04 12:34:48,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:48,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:48,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:48,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:48,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:50,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:50,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:50,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:50,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:50,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:50,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:34:50,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:34:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:34:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:34:50,297 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-10-04 12:34:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:50,411 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-10-04 12:34:50,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:34:50,412 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-10-04 12:34:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:50,413 INFO L225 Difference]: With dead ends: 213 [2018-10-04 12:34:50,413 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 12:34:50,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:34:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 12:34:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-04 12:34:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-04 12:34:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-04 12:34:50,417 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-04 12:34:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:50,418 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-04 12:34:50,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:34:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-04 12:34:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 12:34:50,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:50,419 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-10-04 12:34:50,419 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:50,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-10-04 12:34:50,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:50,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:50,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:50,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:50,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:52,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:52,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:52,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:52,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:52,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:52,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:52,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:52,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:34:52,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:34:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:34:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:34:52,325 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-10-04 12:34:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:52,510 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-10-04 12:34:52,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:34:52,510 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-10-04 12:34:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:52,511 INFO L225 Difference]: With dead ends: 215 [2018-10-04 12:34:52,511 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 12:34:52,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:34:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 12:34:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 12:34:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 12:34:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 12:34:52,516 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-10-04 12:34:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:52,516 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 12:34:52,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:34:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 12:34:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-04 12:34:52,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:52,517 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-10-04 12:34:52,517 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:52,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-10-04 12:34:52,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:52,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:52,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:52,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:52,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:54,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:54,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:54,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:54,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:54,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:54,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:54,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:54,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:34:54,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:34:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:34:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:34:54,627 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-10-04 12:34:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:54,849 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-10-04 12:34:54,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:34:54,849 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-10-04 12:34:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:54,850 INFO L225 Difference]: With dead ends: 216 [2018-10-04 12:34:54,850 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 12:34:54,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:34:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 12:34:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-10-04 12:34:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-04 12:34:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-10-04 12:34:54,854 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-10-04 12:34:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:54,854 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-10-04 12:34:54,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:34:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-10-04 12:34:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-04 12:34:54,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:54,855 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-10-04 12:34:54,855 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:54,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-10-04 12:34:54,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:54,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:54,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:54,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:54,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:56,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:56,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:34:56,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:56,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:34:56,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:56,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:56,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:56,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:34:56,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:34:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:34:56,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:34:56,944 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-10-04 12:34:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:57,170 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-10-04 12:34:57,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:34:57,171 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-10-04 12:34:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:57,172 INFO L225 Difference]: With dead ends: 218 [2018-10-04 12:34:57,172 INFO L226 Difference]: Without dead ends: 214 [2018-10-04 12:34:57,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:34:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-04 12:34:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-10-04 12:34:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-04 12:34:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-10-04 12:34:57,175 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-10-04 12:34:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:57,175 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-10-04 12:34:57,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:34:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-10-04 12:34:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 12:34:57,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:57,176 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-10-04 12:34:57,176 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:57,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-10-04 12:34:57,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:57,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:57,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:57,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:57,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 12:34:58,954 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:34:58,958 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:34:58,959 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:34:58 BoogieIcfgContainer [2018-10-04 12:34:58,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:34:58,960 INFO L168 Benchmark]: Toolchain (without parser) took 233411.98 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 230.7 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 249.4 MB). Peak memory consumption was 480.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:34:58,961 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:34:58,962 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:34:58,962 INFO L168 Benchmark]: Boogie Preprocessor took 19.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:34:58,962 INFO L168 Benchmark]: RCFGBuilder took 330.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:34:58,962 INFO L168 Benchmark]: TraceAbstraction took 233022.20 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 230.7 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 228.3 MB). Peak memory consumption was 459.0 MB. Max. memory is 7.1 GB. [2018-10-04 12:34:58,964 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 330.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233022.20 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 230.7 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 228.3 MB). Peak memory consumption was 459.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 71 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 232.9s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 89.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 193.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, 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, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 7.3s SatisfiabilityAnalysisTime, 128.4s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 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/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-34-58-973.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-34-58-973.csv Completed graceful shutdown