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/Luxembourg-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:32:02,278 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:32:02,280 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:32:02,295 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 12:32:02,339 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 12:32:02,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:32:02,355 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:32:02,356 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:32:02,356 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:32:02,356 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:32:02,357 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:32:02,357 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:32:02,357 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:32:02,357 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:32:02,357 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:32:02,358 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:32:02,358 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:32:02,358 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:32:02,358 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:32:02,358 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:32:02,359 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:32:02,359 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:32:02,359 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:32:02,359 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:32:02,359 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:32:02,360 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:32:02,360 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:32:02,360 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:32:02,360 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:32:02,360 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:32:02,361 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:32:02,361 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:32:02,361 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:32:02,361 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:32:02,361 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:32:02,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:32:02,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:32:02,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:32:02,445 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:32:02,446 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:32:02,447 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-10-04 12:32:02,448 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-10-04 12:32:02,503 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:32:02,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:32:02,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:32:02,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:32:02,506 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:32:02,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,547 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:32:02,548 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:32:02,548 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:32:02,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:32:02,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:32:02,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:32:02,551 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:32:02,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/1) ... [2018-10-04 12:32:02,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:32:02,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:32:02,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:32:02,577 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:32:02,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (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 12:32:02,644 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 12:32:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 12:32:02,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 12:32:02,865 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:32:02,866 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:32:02 BoogieIcfgContainer [2018-10-04 12:32:02,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:32:02,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:32:02,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:32:02,870 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:32:02,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:32:02" (1/2) ... [2018-10-04 12:32:02,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53124772 and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:32:02, skipping insertion in model container [2018-10-04 12:32:02,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:32:02" (2/2) ... [2018-10-04 12:32:02,874 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-10-04 12:32:02,884 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:32:02,893 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:32:02,945 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:32:02,946 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:32:02,946 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:32:02,946 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:32:02,947 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:32:02,947 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:32:02,947 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:32:02,947 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:32:02,947 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:32:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-04 12:32:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:32:02,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:02,971 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:32:02,973 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:02,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:02,980 INFO L82 PathProgramCache]: Analyzing trace with hash 890493448, now seen corresponding path program 1 times [2018-10-04 12:32:02,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:02,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:03,158 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 12:32:03,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:32:03,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:32:03,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:32:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:32:03,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:32:03,200 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2018-10-04 12:32:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:03,297 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2018-10-04 12:32:03,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:32:03,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-04 12:32:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:03,329 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:32:03,329 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:32:03,334 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 12:32:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:32:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:32:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:32:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:32:03,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2018-10-04 12:32:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:03,375 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:32:03,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:32:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:32:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:32:03,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:03,376 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:32:03,376 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:03,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 892342412, now seen corresponding path program 1 times [2018-10-04 12:32:03,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:03,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:03,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:03,420 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 12:32:03,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:32:03,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:32:03,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:32:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:32:03,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:32:03,423 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-10-04 12:32:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:03,432 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:32:03,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:32:03,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-04 12:32:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:03,433 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:32:03,434 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:32:03,435 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 12:32:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:32:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:32:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:32:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:32:03,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-10-04 12:32:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:03,438 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:32:03,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:32:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:32:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:32:03,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:03,439 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:03,440 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:03,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -391235530, now seen corresponding path program 1 times [2018-10-04 12:32:03,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:03,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:03,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:03,501 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 12:32:03,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:03,503 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 12:32:03,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:03,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:03,552 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 12:32:03,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:03,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:32:03,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:32:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:32:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:32:03,587 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-04 12:32:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:03,670 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:32:03,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:32:03,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-04 12:32:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:03,671 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:32:03,672 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:32:03,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:32:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:32:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:32:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:32:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:32:03,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-10-04 12:32:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:03,676 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:32:03,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:32:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:32:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:32:03,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:03,678 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:03,678 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:03,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash -602113312, now seen corresponding path program 2 times [2018-10-04 12:32:03,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:03,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:03,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:03,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:03,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:03,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:03,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:03,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:03,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:03,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:03,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:32:03,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:32:03,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:32:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:32:03,937 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-10-04 12:32:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:03,960 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:32:03,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:32:03,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-04 12:32:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:03,962 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:32:03,962 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:32:03,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:32:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:32:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:32:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:32:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:32:03,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-10-04 12:32:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:03,966 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:32:03,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:32:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:32:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:32:03,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:03,968 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:03,968 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:03,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 334846090, now seen corresponding path program 3 times [2018-10-04 12:32:03,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:03,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:03,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:04,124 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 12:32:04,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:04,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:32:04,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:04,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:04,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:32:04,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:32:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:32:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:32:04,232 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-10-04 12:32:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:04,321 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:32:04,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:32:04,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-04 12:32:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:04,323 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:32:04,323 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:32:04,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:32:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:32:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:32:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:32:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:32:04,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-04 12:32:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:04,332 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:32:04,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:32:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:32:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:32:04,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:04,334 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:04,336 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:04,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash -747417292, now seen corresponding path program 4 times [2018-10-04 12:32:04,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:04,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:04,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:04,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:04,526 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 12:32:04,538 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:04,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:04,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:04,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:04,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:32:04,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:32:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:32:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:32:04,605 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-10-04 12:32:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:04,646 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:32:04,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:32:04,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-04 12:32:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:04,649 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:32:04,649 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:32:04,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:32:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:32:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:32:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:32:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:32:04,654 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-10-04 12:32:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:04,655 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:32:04,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:32:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:32:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:32:04,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:04,656 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:04,656 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:04,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1016128734, now seen corresponding path program 5 times [2018-10-04 12:32:04,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:04,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:04,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:04,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:04,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:04,830 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 12:32:04,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:04,861 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:32:04,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:04,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:04,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:04,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:32:04,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:32:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:32:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:32:04,904 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-10-04 12:32:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:05,036 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:32:05,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:32:05,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-04 12:32:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:05,038 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:32:05,038 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:32:05,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:32:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:32:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:32:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:32:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:32:05,043 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-10-04 12:32:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:05,044 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:32:05,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:32:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:32:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:32:05,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:05,045 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:05,045 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:05,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash -267873400, now seen corresponding path program 6 times [2018-10-04 12:32:05,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:05,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:05,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:05,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:05,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:05,150 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 12:32:05,160 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:05,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:32:05,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:05,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:05,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:32:05,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:32:05,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:32:05,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:32:05,227 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-10-04 12:32:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:05,255 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:32:05,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:32:05,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-04 12:32:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:05,256 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:32:05,257 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:32:05,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:32:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:32:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:32:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:32:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:32:05,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-10-04 12:32:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:05,262 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:32:05,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:32:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:32:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:32:05,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:05,263 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:05,263 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:05,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947278, now seen corresponding path program 7 times [2018-10-04 12:32:05,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:05,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:05,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:05,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:05,757 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 12:32:05,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:05,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:05,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:32:05,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:32:05,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:32:05,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:32:05,834 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-10-04 12:32:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:05,885 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:32:05,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:32:05,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-04 12:32:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:05,887 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:32:05,887 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:32:05,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:32:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:32:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:32:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:32:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:32:05,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-10-04 12:32:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:05,895 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:32:05,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:32:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:32:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:32:05,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:05,896 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:05,897 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:05,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash -223329828, now seen corresponding path program 8 times [2018-10-04 12:32:05,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:05,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:05,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:05,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:05,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:06,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:06,058 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 12:32:06,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:06,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:06,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:06,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:06,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:06,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:32:06,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:32:06,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:32:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:32:06,119 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-10-04 12:32:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:06,175 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:32:06,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:32:06,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-04 12:32:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:06,177 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:32:06,177 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:32:06,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 12:32:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:32:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:32:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:32:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:32:06,182 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-10-04 12:32:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:06,182 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:32:06,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:32:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:32:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:32:06,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:06,184 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:06,184 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:06,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1659551354, now seen corresponding path program 9 times [2018-10-04 12:32:06,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:06,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:06,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:06,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:06,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:06,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:06,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:06,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:06,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:32:06,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:06,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:06,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:06,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:32:06,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:32:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:32:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:32:06,574 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-10-04 12:32:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:06,836 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:32:06,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:32:06,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-10-04 12:32:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:06,837 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:32:06,837 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:32:06,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:32:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:32:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:32:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:32:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:32:06,842 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-10-04 12:32:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:06,842 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:32:06,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:32:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:32:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:32:06,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:06,844 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:06,845 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:06,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2009179088, now seen corresponding path program 10 times [2018-10-04 12:32:06,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:06,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:06,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:06,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:06,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:07,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:07,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:07,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:07,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:07,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:07,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:07,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:07,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:32:07,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:32:07,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:32:07,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:32:07,199 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-10-04 12:32:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:07,286 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:32:07,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:32:07,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-04 12:32:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:07,292 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:32:07,292 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:32:07,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:32:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:32:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:32:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:32:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:32:07,298 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-10-04 12:32:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:07,299 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:32:07,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:32:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:32:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:32:07,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:07,300 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:07,300 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:07,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash 782635482, now seen corresponding path program 11 times [2018-10-04 12:32:07,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:07,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:07,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:07,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:07,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:07,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:07,526 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 12:32:07,533 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:07,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:32:07,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:07,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:07,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:07,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:32:07,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:32:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:32:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:32:07,593 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-10-04 12:32:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:07,630 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:32:07,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:32:07,631 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-10-04 12:32:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:07,632 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:32:07,632 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:32:07,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:32:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:32:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:32:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:32:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:32:07,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-10-04 12:32:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:07,639 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:32:07,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:32:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:32:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:32:07,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:07,640 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:07,641 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:07,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1233576580, now seen corresponding path program 12 times [2018-10-04 12:32:07,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:07,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:07,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:07,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:07,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:07,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:07,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:07,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:08,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:32:08,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:08,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:08,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:08,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:32:08,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:32:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:32:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:32:08,075 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-10-04 12:32:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:08,163 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:32:08,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:32:08,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-04 12:32:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:08,165 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:32:08,165 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:32:08,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:32:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:32:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:32:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:32:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:32:08,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-10-04 12:32:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:08,171 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:32:08,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:32:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:32:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:32:08,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:08,172 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:08,172 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:08,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1893420590, now seen corresponding path program 13 times [2018-10-04 12:32:08,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:08,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:08,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:08,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:08,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:08,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:08,414 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 12:32:08,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:08,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:08,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:08,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:32:08,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:32:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:32:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:32:08,482 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-10-04 12:32:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:08,551 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:32:08,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:32:08,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-10-04 12:32:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:08,553 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:32:08,553 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:32:08,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:32:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:32:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:32:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:32:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:32:08,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-10-04 12:32:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:08,559 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:32:08,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:32:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:32:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:32:08,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:08,560 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:08,561 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:08,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478568, now seen corresponding path program 14 times [2018-10-04 12:32:08,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:08,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:08,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:08,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:08,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:09,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:09,201 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 12:32:09,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:09,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:09,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:09,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:09,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:09,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:32:09,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:32:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:32:09,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:32:09,288 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-10-04 12:32:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:09,346 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:32:09,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:32:09,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-10-04 12:32:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:09,347 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:32:09,347 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:32:09,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:32:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:32:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:32:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:32:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:32:09,352 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-10-04 12:32:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:09,353 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:32:09,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:32:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:32:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:32:09,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:09,354 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:09,354 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:09,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:09,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1586034306, now seen corresponding path program 15 times [2018-10-04 12:32:09,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:09,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:09,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:09,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:09,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:09,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:09,592 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 12:32:09,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:09,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:32:09,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:09,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:09,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:09,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:32:09,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:32:09,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:32:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:32:09,682 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-10-04 12:32:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:09,720 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:32:09,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:32:09,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-10-04 12:32:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:09,721 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:32:09,721 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:32:09,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:32:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:32:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:32:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:32:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:32:09,727 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-10-04 12:32:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:09,727 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:32:09,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:32:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:32:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:32:09,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:09,729 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:09,729 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:09,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1318531884, now seen corresponding path program 16 times [2018-10-04 12:32:09,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:09,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:09,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:09,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:09,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:10,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:10,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:10,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:10,167 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:10,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:10,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:10,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:10,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:32:10,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:32:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:32:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:32:10,211 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-10-04 12:32:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:10,356 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:32:10,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:32:10,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-04 12:32:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:10,358 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:32:10,358 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:32:10,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:32:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:32:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:32:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:32:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:32:10,363 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-10-04 12:32:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:10,363 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:32:10,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:32:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:32:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:32:10,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:10,365 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:10,365 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:10,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash -561837354, now seen corresponding path program 17 times [2018-10-04 12:32:10,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:10,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:10,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:10,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:10,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:11,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:11,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:11,020 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:11,046 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:32:11,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:11,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:11,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:11,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:32:11,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:32:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:32:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:32:11,094 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-10-04 12:32:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:11,138 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:32:11,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:32:11,139 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-10-04 12:32:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:11,140 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:32:11,140 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:32:11,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 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 12:32:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:32:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:32:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:32:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:32:11,145 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-10-04 12:32:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:11,146 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:32:11,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:32:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:32:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:32:11,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:11,147 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:11,147 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:11,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1611070848, now seen corresponding path program 18 times [2018-10-04 12:32:11,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:11,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:11,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:11,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:11,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:11,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:11,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:11,411 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:11,533 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:32:11,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:11,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:11,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:11,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:32:11,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:32:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:32:11,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:32:11,594 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-10-04 12:32:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:11,652 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:32:11,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:32:11,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-10-04 12:32:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:11,653 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:32:11,653 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:32:11,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:32:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:32:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:32:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:32:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:32:11,658 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-10-04 12:32:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:11,658 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:32:11,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:32:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:32:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:32:11,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:11,660 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:11,660 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:11,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1013085398, now seen corresponding path program 19 times [2018-10-04 12:32:11,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:11,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:11,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:11,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:11,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:12,053 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 12:32:12,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:12,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:12,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:32:12,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:32:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:32:12,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:32:12,132 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-10-04 12:32:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:12,246 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:32:12,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:32:12,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-10-04 12:32:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:12,247 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:32:12,247 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:32:12,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:32:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:32:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:32:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:32:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:32:12,251 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-10-04 12:32:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:12,251 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:32:12,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:32:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:32:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:32:12,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:12,252 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:12,252 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:12,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash 947991508, now seen corresponding path program 20 times [2018-10-04 12:32:12,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:12,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:12,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:12,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:12,555 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 12:32:12,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:12,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:12,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:12,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:12,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:32:12,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:32:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:32:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:32:12,657 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-10-04 12:32:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:12,787 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:32:12,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:32:12,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-10-04 12:32:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:12,791 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:32:12,791 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:32:12,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 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 12:32:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:32:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:32:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:32:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:32:12,794 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-10-04 12:32:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:12,794 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:32:12,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:32:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:32:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:32:12,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:12,796 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:12,796 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:12,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -861112450, now seen corresponding path program 21 times [2018-10-04 12:32:12,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:12,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:12,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:12,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:13,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:13,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:13,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:13,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:32:13,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:13,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:13,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:13,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:32:13,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:32:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:32:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:32:13,574 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-10-04 12:32:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:13,973 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:32:13,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:32:13,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-10-04 12:32:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:13,975 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:32:13,975 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:32:13,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:32:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:32:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:32:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:32:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:32:13,978 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-10-04 12:32:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:13,978 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:32:13,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:32:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:32:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:32:13,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:13,979 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:13,979 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:13,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash 215602728, now seen corresponding path program 22 times [2018-10-04 12:32:13,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:13,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:13,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:13,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:13,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:14,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:14,598 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 12:32:14,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:14,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:14,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:14,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:14,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:14,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:32:14,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:32:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:32:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:32:14,667 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-10-04 12:32:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:14,731 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:32:14,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:32:14,732 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-10-04 12:32:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:14,733 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:32:14,733 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:32:14,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:32:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:32:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:32:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:32:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:32:14,738 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-10-04 12:32:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:14,738 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:32:14,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:32:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:32:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:32:14,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:14,739 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:14,739 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:14,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1534865454, now seen corresponding path program 23 times [2018-10-04 12:32:14,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:14,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:14,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:14,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:14,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:15,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:15,142 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 12:32:15,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:15,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:32:15,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:15,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:15,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:15,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:32:15,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:32:15,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:32:15,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:32:15,225 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-10-04 12:32:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:15,268 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:32:15,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:32:15,270 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-10-04 12:32:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:15,271 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:32:15,271 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:32:15,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:32:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:32:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:32:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:32:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:32:15,274 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-10-04 12:32:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:15,274 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:32:15,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:32:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:32:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:32:15,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:15,275 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:15,276 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:15,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:15,276 INFO L82 PathProgramCache]: Analyzing trace with hash -35330948, now seen corresponding path program 24 times [2018-10-04 12:32:15,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:15,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:15,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:15,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:15,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:16,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:16,575 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 12:32:16,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:16,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:32:16,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:16,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:16,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:16,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:32:16,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:32:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:32:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:32:16,675 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-10-04 12:32:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:16,815 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:32:16,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:32:16,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-10-04 12:32:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:16,817 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:32:16,818 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:32:16,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:32:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:32:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:32:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:32:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 12:32:16,821 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-10-04 12:32:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:16,822 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 12:32:16,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:32:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 12:32:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:32:16,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:16,823 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:16,823 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:16,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:16,823 INFO L82 PathProgramCache]: Analyzing trace with hash -503868378, now seen corresponding path program 25 times [2018-10-04 12:32:16,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:16,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:16,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:17,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:17,354 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 12:32:17,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:17,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:17,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:17,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:32:17,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:32:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:32:17,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:32:17,437 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-10-04 12:32:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:17,493 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 12:32:17,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:32:17,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-10-04 12:32:17,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:17,495 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:32:17,495 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:32:17,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 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 12:32:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:32:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 12:32:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:32:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 12:32:17,499 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-10-04 12:32:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:17,499 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 12:32:17,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:32:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 12:32:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:32:17,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:17,500 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:17,500 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:17,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash 410410704, now seen corresponding path program 26 times [2018-10-04 12:32:17,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:17,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:17,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:17,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:17,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:18,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:18,302 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 12:32:18,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:18,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:18,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:18,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:18,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:18,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:32:18,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:32:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:32:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:32:18,383 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-10-04 12:32:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:18,501 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 12:32:18,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:32:18,502 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-10-04 12:32:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:18,504 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:32:18,504 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:32:18,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:32:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:32:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 12:32:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:32:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 12:32:18,509 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-10-04 12:32:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:18,509 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 12:32:18,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:32:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 12:32:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:32:18,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:18,510 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:18,511 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:18,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash 131843194, now seen corresponding path program 27 times [2018-10-04 12:32:18,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:18,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:18,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:18,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:18,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:19,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:19,528 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 12:32:19,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:19,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:32:19,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:19,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:19,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:19,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:32:19,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:32:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:32:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:32:19,612 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-10-04 12:32:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:19,673 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-04 12:32:19,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:32:19,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-10-04 12:32:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:19,675 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:32:19,676 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:32:19,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:32:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:32:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-04 12:32:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:32:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-04 12:32:19,680 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-10-04 12:32:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:19,680 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-04 12:32:19,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:32:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-04 12:32:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:32:19,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:19,681 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:19,681 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:19,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1432503588, now seen corresponding path program 28 times [2018-10-04 12:32:19,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:19,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:19,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:19,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:19,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:20,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:20,132 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 12:32:20,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:20,166 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:20,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:20,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:20,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:20,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:32:20,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:32:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:32:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:32:20,213 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-10-04 12:32:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:20,302 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-04 12:32:20,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:32:20,303 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-10-04 12:32:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:20,304 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:32:20,305 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:32:20,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:32:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:32:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-04 12:32:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:32:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-04 12:32:20,310 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-10-04 12:32:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:20,310 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-04 12:32:20,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:32:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-04 12:32:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:32:20,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:20,311 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:20,311 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:20,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:20,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2063310642, now seen corresponding path program 29 times [2018-10-04 12:32:20,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:20,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:20,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:20,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:20,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:21,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:21,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:21,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:32:21,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:21,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:21,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:32:21,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:32:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:32:21,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:32:21,130 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-10-04 12:32:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:21,307 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-04 12:32:21,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:32:21,307 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-10-04 12:32:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:21,309 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:32:21,309 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:32:21,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:32:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:32:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-04 12:32:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:32:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-04 12:32:21,312 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-10-04 12:32:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:21,313 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-04 12:32:21,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:32:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-04 12:32:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:32:21,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:21,313 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:21,314 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:21,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1719888008, now seen corresponding path program 30 times [2018-10-04 12:32:21,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:21,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:21,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:21,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:21,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:21,773 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 12:32:21,780 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:21,820 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:32:21,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:21,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:21,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:32:21,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:32:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:32:21,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:32:21,864 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-10-04 12:32:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:22,004 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-04 12:32:22,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:32:22,004 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-10-04 12:32:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:22,005 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:32:22,005 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:32:22,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:32:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:32:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 12:32:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:32:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-04 12:32:22,009 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-10-04 12:32:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:22,009 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-04 12:32:22,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:32:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-04 12:32:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:32:22,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:22,010 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:22,010 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:22,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1270519518, now seen corresponding path program 31 times [2018-10-04 12:32:22,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:22,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:22,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:22,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:22,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:22,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:22,550 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 12:32:22,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:22,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:22,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:22,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:32:22,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:32:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:32:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:32:22,638 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-10-04 12:32:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:22,704 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-04 12:32:22,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:32:22,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-10-04 12:32:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:22,706 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:32:22,707 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:32:22,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 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 12:32:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:32:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-04 12:32:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:32:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-04 12:32:22,710 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-10-04 12:32:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:22,711 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-04 12:32:22,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:32:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-04 12:32:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:32:22,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:22,712 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:22,712 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:22,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1248242228, now seen corresponding path program 32 times [2018-10-04 12:32:22,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:22,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:22,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:22,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:22,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:23,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:23,408 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 12:32:23,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:23,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:23,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:23,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:23,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:23,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:32:23,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:32:23,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:32:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:32:23,491 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-10-04 12:32:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:23,573 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-04 12:32:23,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:32:23,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-10-04 12:32:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:23,575 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:32:23,575 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:32:23,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 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 12:32:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:32:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-04 12:32:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:32:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-04 12:32:23,578 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-10-04 12:32:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:23,578 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-04 12:32:23,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:32:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-04 12:32:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:32:23,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:23,579 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:23,580 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:23,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash -596451978, now seen corresponding path program 33 times [2018-10-04 12:32:23,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:23,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:23,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:24,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:24,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:24,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:24,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:32:24,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:24,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:24,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:24,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:32:24,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:32:24,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:32:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:32:24,278 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-10-04 12:32:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:24,364 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-04 12:32:24,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:32:24,365 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-10-04 12:32:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:24,366 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:32:24,366 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:32:24,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:32:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:32:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-04 12:32:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:32:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-04 12:32:24,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-10-04 12:32:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:24,370 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-04 12:32:24,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:32:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-04 12:32:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:32:24,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:24,371 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:24,371 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:24,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1720483872, now seen corresponding path program 34 times [2018-10-04 12:32:24,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:24,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:24,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:24,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:24,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:25,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:25,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:25,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:25,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:25,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:25,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:25,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:25,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:32:25,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:32:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:32:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:32:25,135 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-10-04 12:32:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:25,212 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-04 12:32:25,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:32:25,213 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-10-04 12:32:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:25,215 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:32:25,215 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:32:25,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:32:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:32:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-04 12:32:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:32:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-04 12:32:25,219 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-10-04 12:32:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:25,219 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-04 12:32:25,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:32:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-04 12:32:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:32:25,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:25,220 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:25,221 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:25,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:25,221 INFO L82 PathProgramCache]: Analyzing trace with hash 811646410, now seen corresponding path program 35 times [2018-10-04 12:32:25,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:25,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:25,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:25,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:25,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:26,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:26,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:26,361 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:26,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:32:26,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:26,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:26,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:26,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:32:26,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:32:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:32:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:32:26,484 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-10-04 12:32:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:26,607 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-04 12:32:26,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:32:26,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-10-04 12:32:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:26,609 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:32:26,610 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:32:26,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:32:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:32:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 12:32:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:32:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-04 12:32:26,614 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-10-04 12:32:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:26,614 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-04 12:32:26,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:32:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-04 12:32:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:32:26,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:26,615 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:26,615 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:26,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1428821620, now seen corresponding path program 36 times [2018-10-04 12:32:26,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:26,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:26,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:26,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:26,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:27,309 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 12:32:27,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:27,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:32:27,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:27,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:27,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:32:27,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:32:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:32:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:32:27,438 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-10-04 12:32:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:27,534 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-04 12:32:27,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:32:27,534 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-10-04 12:32:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:27,536 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:32:27,536 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:32:27,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:32:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:32:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-04 12:32:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:32:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-04 12:32:27,540 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-10-04 12:32:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:27,540 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-04 12:32:27,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:32:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-04 12:32:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:32:27,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:27,542 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:27,542 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:27,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash -823981538, now seen corresponding path program 37 times [2018-10-04 12:32:27,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:27,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:27,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:27,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:27,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:28,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:28,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:28,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:28,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:28,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:28,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:32:28,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:32:28,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:32:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:32:28,440 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-10-04 12:32:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:29,396 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-04 12:32:29,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:32:29,396 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-10-04 12:32:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:29,398 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:32:29,398 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:32:29,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:32:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:32:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-04 12:32:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:32:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-04 12:32:29,402 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-10-04 12:32:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:29,403 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-04 12:32:29,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:32:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-04 12:32:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:32:29,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:29,404 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:29,404 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:29,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 373692616, now seen corresponding path program 38 times [2018-10-04 12:32:29,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:29,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:29,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:29,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:29,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:30,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:30,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:30,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:30,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:30,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:30,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:30,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:30,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:32:30,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:32:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:32:30,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:32:30,662 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-10-04 12:32:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:31,635 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-04 12:32:31,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:32:31,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-04 12:32:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:31,636 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:32:31,636 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:32:31,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:32:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:32:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-04 12:32:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:32:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-04 12:32:31,646 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-10-04 12:32:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:31,646 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-04 12:32:31,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:32:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-04 12:32:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:32:31,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:31,648 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:31,648 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:31,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1026702734, now seen corresponding path program 39 times [2018-10-04 12:32:31,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:31,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:31,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:31,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:31,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:32,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:32,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:32,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:32,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-04 12:32:32,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:32,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:32,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:32,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:32:32,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:32:32,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:32:32,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:32:32,755 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-10-04 12:32:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:32,847 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-04 12:32:32,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:32:32,847 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-10-04 12:32:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:32,849 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:32:32,849 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:32:32,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:32:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:32:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-04 12:32:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:32:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-04 12:32:32,854 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-10-04 12:32:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:32,854 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-04 12:32:32,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:32:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-04 12:32:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:32:32,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:32,856 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:32,856 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:32,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:32,857 INFO L82 PathProgramCache]: Analyzing trace with hash 716474140, now seen corresponding path program 40 times [2018-10-04 12:32:32,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:32,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:32,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:32,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:32,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:33,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:33,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:33,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:33,795 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:33,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:33,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:33,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:33,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:32:33,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:32:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:32:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:32:33,847 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-10-04 12:32:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:33,963 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-04 12:32:33,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:32:33,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-10-04 12:32:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:33,965 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:32:33,965 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:32:33,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:32:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:32:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 12:32:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:32:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-04 12:32:33,969 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-10-04 12:32:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:33,969 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-04 12:32:33,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:32:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-04 12:32:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:32:33,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:33,970 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:33,970 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:33,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash 49604294, now seen corresponding path program 41 times [2018-10-04 12:32:33,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:33,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:33,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:33,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:33,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:34,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:34,833 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 12:32:34,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:34,900 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-04 12:32:34,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:34,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:34,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:34,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:32:34,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:32:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:32:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:32:34,967 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-10-04 12:32:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:35,364 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-04 12:32:35,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:32:35,364 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-10-04 12:32:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:35,366 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:32:35,366 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:32:35,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:32:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:32:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-04 12:32:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:32:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-04 12:32:35,371 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-10-04 12:32:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:35,371 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-04 12:32:35,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:32:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-04 12:32:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:32:35,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:35,372 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:35,373 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:35,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash -11968144, now seen corresponding path program 42 times [2018-10-04 12:32:35,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:35,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:35,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:35,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:35,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:38,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:38,246 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 12:32:38,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:38,304 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:32:38,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:38,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:38,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:38,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:32:38,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:32:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:32:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:32:38,383 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-10-04 12:32:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:38,571 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-04 12:32:38,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:32:38,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-10-04 12:32:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:38,573 INFO L225 Difference]: With dead ends: 181 [2018-10-04 12:32:38,574 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:32:38,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:32:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:32:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-04 12:32:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:32:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-04 12:32:38,578 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-10-04 12:32:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:38,579 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-04 12:32:38,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:32:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-04 12:32:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:32:38,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:38,580 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:38,580 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:38,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1915516698, now seen corresponding path program 43 times [2018-10-04 12:32:38,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:38,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:38,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:38,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:38,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:39,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:39,439 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 12:32:39,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:39,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:39,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:39,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:32:39,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:32:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:32:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:32:39,550 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-10-04 12:32:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:39,895 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-04 12:32:39,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:32:39,895 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-10-04 12:32:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:39,897 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:32:39,897 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:32:39,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:32:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:32:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-04 12:32:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 12:32:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-04 12:32:39,901 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-10-04 12:32:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:39,901 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-04 12:32:39,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:32:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-04 12:32:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:32:39,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:39,902 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:39,902 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:39,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash -321345596, now seen corresponding path program 44 times [2018-10-04 12:32:39,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:39,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:39,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:39,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:39,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:40,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:40,841 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 12:32:40,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:40,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:40,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:40,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:40,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:40,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:32:40,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:32:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:32:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:32:40,955 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-10-04 12:32:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:41,061 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-04 12:32:41,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:32:41,062 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-10-04 12:32:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:41,063 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:32:41,063 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:32:41,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:32:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:32:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-04 12:32:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:32:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-04 12:32:41,066 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-10-04 12:32:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:41,067 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-04 12:32:41,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:32:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-04 12:32:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 12:32:41,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:41,068 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:41,068 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:41,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -548899986, now seen corresponding path program 45 times [2018-10-04 12:32:41,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:41,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:41,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:41,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:41,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:41,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:41,997 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 12:32:42,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:42,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-04 12:32:42,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:42,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:42,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:42,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:32:42,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:32:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:32:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:32:42,134 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-10-04 12:32:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:42,254 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-04 12:32:42,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:32:42,254 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-10-04 12:32:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:42,255 INFO L225 Difference]: With dead ends: 193 [2018-10-04 12:32:42,255 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:32:42,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:32:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:32:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 12:32:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:32:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-04 12:32:42,259 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-10-04 12:32:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:42,259 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-04 12:32:42,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:32:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-04 12:32:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 12:32:42,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:42,261 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:42,261 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:42,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 943086104, now seen corresponding path program 46 times [2018-10-04 12:32:42,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:42,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:42,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:42,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:42,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:43,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:43,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:43,988 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:44,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:44,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:44,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:44,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:44,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:32:44,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:32:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:32:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:32:44,111 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-10-04 12:32:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:44,253 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-04 12:32:44,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:32:44,254 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-10-04 12:32:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:44,255 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:32:44,255 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:32:44,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:32:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:32:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-04 12:32:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:32:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-04 12:32:44,259 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-10-04 12:32:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:44,260 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-04 12:32:44,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:32:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-04 12:32:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:32:44,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:44,261 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:44,261 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:44,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 85777346, now seen corresponding path program 47 times [2018-10-04 12:32:44,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:44,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:44,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:44,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:44,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:45,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:45,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:45,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:45,765 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-04 12:32:45,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:45,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:45,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:45,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:32:45,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:32:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:32:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:32:45,845 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-10-04 12:32:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:45,969 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-04 12:32:45,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:32:45,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-10-04 12:32:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:45,971 INFO L225 Difference]: With dead ends: 201 [2018-10-04 12:32:45,971 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 12:32:45,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:32:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 12:32:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-04 12:32:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 12:32:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-04 12:32:45,974 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-10-04 12:32:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:45,975 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-04 12:32:45,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:32:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-04 12:32:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 12:32:45,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:45,976 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:45,976 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:45,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash 305559660, now seen corresponding path program 48 times [2018-10-04 12:32:45,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:45,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:45,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:45,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:45,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:47,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:47,013 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 12:32:47,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:47,079 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:32:47,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:47,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:47,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:47,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:32:47,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:32:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:32:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:32:47,146 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-10-04 12:32:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:47,259 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-04 12:32:47,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:32:47,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-04 12:32:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:47,261 INFO L225 Difference]: With dead ends: 205 [2018-10-04 12:32:47,261 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 12:32:47,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:32:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 12:32:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-04 12:32:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 12:32:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-04 12:32:47,265 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-10-04 12:32:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:47,265 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-04 12:32:47,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:32:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-04 12:32:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 12:32:47,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:47,266 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:47,266 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:47,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:47,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1971474410, now seen corresponding path program 49 times [2018-10-04 12:32:47,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:47,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:47,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:47,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:47,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:48,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:48,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:48,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:48,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:48,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:48,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:32:48,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:32:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:32:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:32:48,456 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 52 states. [2018-10-04 12:32:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:48,563 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-04 12:32:48,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:32:48,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-10-04 12:32:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:48,566 INFO L225 Difference]: With dead ends: 209 [2018-10-04 12:32:48,566 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 12:32:48,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:32:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 12:32:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-04 12:32:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-04 12:32:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-04 12:32:48,569 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-10-04 12:32:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:48,570 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-04 12:32:48,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:32:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-04 12:32:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-04 12:32:48,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:48,571 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:48,571 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:48,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1750269248, now seen corresponding path program 50 times [2018-10-04 12:32:48,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:48,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:48,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:48,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:48,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:49,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:49,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:49,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:49,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:49,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:49,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:50,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:50,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:32:50,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:32:50,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:32:50,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:32:50,057 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 53 states. [2018-10-04 12:32:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:50,382 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-04 12:32:50,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:32:50,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-10-04 12:32:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:50,385 INFO L225 Difference]: With dead ends: 213 [2018-10-04 12:32:50,385 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 12:32:50,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:32:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 12:32:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 12:32:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 12:32:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-04 12:32:50,389 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-10-04 12:32:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:50,389 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-04 12:32:50,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:32:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-04 12:32:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-04 12:32:50,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:50,391 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:50,391 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:50,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:50,391 INFO L82 PathProgramCache]: Analyzing trace with hash 37679210, now seen corresponding path program 51 times [2018-10-04 12:32:50,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:50,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:50,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:50,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:50,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:52,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:52,146 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 12:32:52,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:52,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-04 12:32:52,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:52,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:52,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:52,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:32:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:32:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:32:52,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:32:52,304 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 54 states. [2018-10-04 12:32:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:52,451 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-04 12:32:52,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:32:52,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-10-04 12:32:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:52,453 INFO L225 Difference]: With dead ends: 217 [2018-10-04 12:32:52,454 INFO L226 Difference]: Without dead ends: 215 [2018-10-04 12:32:52,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:32:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-04 12:32:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-04 12:32:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 12:32:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-04 12:32:52,457 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-10-04 12:32:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:52,458 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-04 12:32:52,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:32:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-04 12:32:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-04 12:32:52,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:52,459 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:52,459 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:52,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash -781321964, now seen corresponding path program 52 times [2018-10-04 12:32:52,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:52,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:52,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:52,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:52,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:54,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:54,185 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 12:32:54,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:54,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:54,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:54,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:54,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:54,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:32:54,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:32:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:32:54,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:32:54,325 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 55 states. [2018-10-04 12:32:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:54,469 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-04 12:32:54,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:32:54,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-10-04 12:32:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:54,471 INFO L225 Difference]: With dead ends: 221 [2018-10-04 12:32:54,471 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 12:32:54,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:32:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 12:32:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-04 12:32:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-04 12:32:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-04 12:32:54,475 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-10-04 12:32:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:54,476 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-04 12:32:54,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:32:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-04 12:32:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 12:32:54,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:54,477 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:54,477 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:54,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:54,478 INFO L82 PathProgramCache]: Analyzing trace with hash -348873538, now seen corresponding path program 53 times [2018-10-04 12:32:54,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:54,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:54,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:54,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:54,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:55,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:55,626 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 12:32:55,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:55,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-04 12:32:55,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:55,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:55,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:55,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:32:55,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:32:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:32:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:32:55,779 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 56 states. [2018-10-04 12:32:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:55,871 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-04 12:32:55,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:32:55,872 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-10-04 12:32:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:55,873 INFO L225 Difference]: With dead ends: 225 [2018-10-04 12:32:55,873 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 12:32:55,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 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 12:32:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 12:32:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-04 12:32:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-04 12:32:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-04 12:32:55,877 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 218 [2018-10-04 12:32:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:55,877 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-04 12:32:55,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:32:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-04 12:32:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 12:32:55,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:55,879 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:55,879 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:55,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1269998744, now seen corresponding path program 54 times [2018-10-04 12:32:55,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:55,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:55,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:55,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:55,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:57,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:57,375 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 12:32:57,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:57,453 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 12:32:57,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:57,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:57,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:57,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:32:57,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:32:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:32:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:32:57,554 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 57 states. [2018-10-04 12:32:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:57,871 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-04 12:32:57,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:32:57,871 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-10-04 12:32:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:57,873 INFO L225 Difference]: With dead ends: 229 [2018-10-04 12:32:57,873 INFO L226 Difference]: Without dead ends: 227 [2018-10-04 12:32:57,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:32:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-04 12:32:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-04 12:32:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-04 12:32:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-04 12:32:57,877 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 222 [2018-10-04 12:32:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:57,877 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-04 12:32:57,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:32:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-04 12:32:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-04 12:32:57,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:57,879 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-04 12:32:57,879 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:57,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:57,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1338854126, now seen corresponding path program 55 times [2018-10-04 12:32:57,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:57,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:57,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:59,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:59,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:32:59,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:59,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:59,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:59,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:32:59,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:32:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:32:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:32:59,373 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 58 states. [2018-10-04 12:33:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:00,458 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-10-04 12:33:00,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:33:00,458 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-10-04 12:33:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:00,460 INFO L225 Difference]: With dead ends: 233 [2018-10-04 12:33:00,460 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 12:33:00,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:33:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 12:33:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-04 12:33:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-04 12:33:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-10-04 12:33:00,464 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 226 [2018-10-04 12:33:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:00,464 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-10-04 12:33:00,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:33:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-10-04 12:33:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-04 12:33:00,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:00,465 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:00,466 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:00,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:00,466 INFO L82 PathProgramCache]: Analyzing trace with hash 555690428, now seen corresponding path program 56 times [2018-10-04 12:33:00,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:00,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:00,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:00,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:00,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:02,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:02,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:02,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:02,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:02,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:02,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:02,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:02,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:33:02,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:33:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:33:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:33:02,302 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 59 states. [2018-10-04 12:33:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:02,440 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-04 12:33:02,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:33:02,441 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-10-04 12:33:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:02,442 INFO L225 Difference]: With dead ends: 237 [2018-10-04 12:33:02,442 INFO L226 Difference]: Without dead ends: 235 [2018-10-04 12:33:02,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:33:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-04 12:33:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-04 12:33:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-04 12:33:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-10-04 12:33:02,446 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 230 [2018-10-04 12:33:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:02,446 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-10-04 12:33:02,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:33:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-10-04 12:33:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-04 12:33:02,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:02,447 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:02,447 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:02,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1475528346, now seen corresponding path program 57 times [2018-10-04 12:33:02,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:02,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:02,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:02,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:02,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:04,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:04,022 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 12:33:04,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:04,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-04 12:33:04,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:04,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:04,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:04,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:33:04,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:33:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:33:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:33:04,219 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 60 states. [2018-10-04 12:33:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:04,446 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-04 12:33:04,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:33:04,447 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-10-04 12:33:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:04,448 INFO L225 Difference]: With dead ends: 241 [2018-10-04 12:33:04,448 INFO L226 Difference]: Without dead ends: 239 [2018-10-04 12:33:04,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:33:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-04 12:33:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-10-04 12:33:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-04 12:33:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-04 12:33:04,452 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 234 [2018-10-04 12:33:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:04,452 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-04 12:33:04,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:33:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-04 12:33:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-04 12:33:04,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:04,453 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:04,453 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:04,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash -457743344, now seen corresponding path program 58 times [2018-10-04 12:33:04,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:04,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:04,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:05,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:05,762 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 12:33:05,772 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:05,835 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:05,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:05,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:05,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:05,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:33:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:33:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:33:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:33:05,933 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 61 states. [2018-10-04 12:33:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:06,159 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-10-04 12:33:06,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:33:06,159 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-10-04 12:33:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:06,160 INFO L225 Difference]: With dead ends: 245 [2018-10-04 12:33:06,161 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 12:33:06,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:33:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 12:33:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-04 12:33:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-04 12:33:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-10-04 12:33:06,164 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 238 [2018-10-04 12:33:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:06,164 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-10-04 12:33:06,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:33:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-10-04 12:33:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-04 12:33:06,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:06,165 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:06,166 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:06,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash 362293690, now seen corresponding path program 59 times [2018-10-04 12:33:06,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:06,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:06,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:06,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:06,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:07,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:07,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:07,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:07,983 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-04 12:33:07,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:07,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:08,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:08,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:33:08,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:33:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:33:08,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:08,056 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 62 states. [2018-10-04 12:33:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:08,213 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-04 12:33:08,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:33:08,214 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-10-04 12:33:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:08,215 INFO L225 Difference]: With dead ends: 249 [2018-10-04 12:33:08,215 INFO L226 Difference]: Without dead ends: 247 [2018-10-04 12:33:08,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:33:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-04 12:33:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-10-04 12:33:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-04 12:33:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-10-04 12:33:08,219 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 242 [2018-10-04 12:33:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:08,220 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-10-04 12:33:08,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:33:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-10-04 12:33:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-04 12:33:08,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:08,221 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:08,222 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:08,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1209398684, now seen corresponding path program 60 times [2018-10-04 12:33:08,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:08,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:08,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:08,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:08,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:09,829 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 12:33:09,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:09,916 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-04 12:33:09,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:09,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:10,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:10,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:33:10,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:33:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:33:10,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:33:10,025 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 63 states. [2018-10-04 12:33:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:10,213 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-04 12:33:10,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:33:10,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-10-04 12:33:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:10,215 INFO L225 Difference]: With dead ends: 253 [2018-10-04 12:33:10,215 INFO L226 Difference]: Without dead ends: 251 [2018-10-04 12:33:10,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:33:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-04 12:33:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-04 12:33:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-04 12:33:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-04 12:33:10,219 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 246 [2018-10-04 12:33:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:10,219 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-04 12:33:10,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:33:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-04 12:33:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-04 12:33:10,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:10,220 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:10,220 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:10,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:10,220 INFO L82 PathProgramCache]: Analyzing trace with hash 665290254, now seen corresponding path program 61 times [2018-10-04 12:33:10,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:10,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:10,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:10,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:11,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:11,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:11,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:12,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:12,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:12,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:33:12,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:33:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:33:12,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:33:12,096 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 64 states. [2018-10-04 12:33:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:12,253 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-10-04 12:33:12,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:33:12,254 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-10-04 12:33:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:12,255 INFO L225 Difference]: With dead ends: 257 [2018-10-04 12:33:12,255 INFO L226 Difference]: Without dead ends: 255 [2018-10-04 12:33:12,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:33:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-04 12:33:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-04 12:33:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-04 12:33:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-04 12:33:12,258 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 250 [2018-10-04 12:33:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:12,258 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-04 12:33:12,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:33:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-04 12:33:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-04 12:33:12,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:12,260 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:12,260 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:12,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1066081464, now seen corresponding path program 62 times [2018-10-04 12:33:12,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:12,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:12,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:12,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:13,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:13,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:14,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:14,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:14,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:14,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:14,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:33:14,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:33:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:33:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:33:14,158 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 65 states. [2018-10-04 12:33:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:14,319 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-04 12:33:14,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:33:14,319 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-10-04 12:33:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:14,321 INFO L225 Difference]: With dead ends: 261 [2018-10-04 12:33:14,321 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 12:33:14,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:33:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 12:33:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-04 12:33:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-04 12:33:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-10-04 12:33:14,324 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 254 [2018-10-04 12:33:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:14,325 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-10-04 12:33:14,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:33:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-10-04 12:33:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-04 12:33:14,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:14,326 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:14,326 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:14,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash -116437406, now seen corresponding path program 63 times [2018-10-04 12:33:14,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:14,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:14,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:14,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:15,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:15,871 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 12:33:15,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:15,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-04 12:33:15,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:15,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:16,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:16,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:33:16,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:33:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:33:16,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:33:16,042 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 66 states. [2018-10-04 12:33:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:16,229 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-04 12:33:16,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:33:16,230 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-10-04 12:33:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:16,231 INFO L225 Difference]: With dead ends: 265 [2018-10-04 12:33:16,231 INFO L226 Difference]: Without dead ends: 263 [2018-10-04 12:33:16,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:33:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-04 12:33:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-10-04 12:33:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-04 12:33:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-04 12:33:16,235 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 258 [2018-10-04 12:33:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:16,236 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-04 12:33:16,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:33:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-04 12:33:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-04 12:33:16,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:16,237 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:16,238 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:16,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash 208575244, now seen corresponding path program 64 times [2018-10-04 12:33:16,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:16,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:16,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:18,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:18,120 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:18,176 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:18,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:18,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:18,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:18,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:33:18,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:33:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:33:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:33:18,275 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 67 states. [2018-10-04 12:33:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:18,488 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-10-04 12:33:18,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:33:18,489 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-10-04 12:33:18,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:18,491 INFO L225 Difference]: With dead ends: 269 [2018-10-04 12:33:18,491 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 12:33:18,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:33:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 12:33:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-04 12:33:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-04 12:33:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-10-04 12:33:18,494 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 262 [2018-10-04 12:33:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:18,494 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-10-04 12:33:18,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:33:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-10-04 12:33:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-04 12:33:18,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:18,496 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:18,496 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:18,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1868332362, now seen corresponding path program 65 times [2018-10-04 12:33:18,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:18,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:18,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:18,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:20,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:20,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:20,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-04 12:33:20,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:20,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:20,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:20,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:33:20,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:33:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:33:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:33:20,319 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 68 states. [2018-10-04 12:33:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:20,497 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-10-04 12:33:20,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:33:20,498 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-10-04 12:33:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:20,499 INFO L225 Difference]: With dead ends: 273 [2018-10-04 12:33:20,500 INFO L226 Difference]: Without dead ends: 271 [2018-10-04 12:33:20,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 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 12:33:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-04 12:33:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-04 12:33:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-04 12:33:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-10-04 12:33:20,506 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 266 [2018-10-04 12:33:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:20,506 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-10-04 12:33:20,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:33:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-10-04 12:33:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-04 12:33:20,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:20,508 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:20,508 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:20,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1687648928, now seen corresponding path program 66 times [2018-10-04 12:33:20,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:20,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:22,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:22,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:22,640 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-04 12:33:22,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:22,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:22,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:22,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:33:22,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:33:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:33:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:33:22,733 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 69 states. [2018-10-04 12:33:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:22,918 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-04 12:33:22,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:33:22,918 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-10-04 12:33:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:22,920 INFO L225 Difference]: With dead ends: 277 [2018-10-04 12:33:22,920 INFO L226 Difference]: Without dead ends: 275 [2018-10-04 12:33:22,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:33:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-04 12:33:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-04 12:33:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-04 12:33:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-04 12:33:22,924 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 270 [2018-10-04 12:33:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:22,924 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-04 12:33:22,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:33:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-04 12:33:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-04 12:33:22,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:22,926 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:22,927 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:22,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:22,927 INFO L82 PathProgramCache]: Analyzing trace with hash -516414710, now seen corresponding path program 67 times [2018-10-04 12:33:22,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:22,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:22,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:22,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:24,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:24,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:24,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:24,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:24,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:24,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:33:24,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:33:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:33:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:33:24,807 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 70 states. [2018-10-04 12:33:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:25,052 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-10-04 12:33:25,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:33:25,052 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-10-04 12:33:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:25,054 INFO L225 Difference]: With dead ends: 281 [2018-10-04 12:33:25,054 INFO L226 Difference]: Without dead ends: 279 [2018-10-04 12:33:25,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:33:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-04 12:33:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-04 12:33:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-04 12:33:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-10-04 12:33:25,058 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 274 [2018-10-04 12:33:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:25,059 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-10-04 12:33:25,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:33:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-10-04 12:33:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-04 12:33:25,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:25,061 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:25,061 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:25,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1431100340, now seen corresponding path program 68 times [2018-10-04 12:33:25,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:25,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:25,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:25,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:26,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:26,925 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 12:33:26,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:26,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:26,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:26,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:27,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:27,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:33:27,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:33:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:33:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:33:27,077 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 71 states. [2018-10-04 12:33:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:27,326 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-10-04 12:33:27,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:33:27,326 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-04 12:33:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:27,327 INFO L225 Difference]: With dead ends: 285 [2018-10-04 12:33:27,328 INFO L226 Difference]: Without dead ends: 283 [2018-10-04 12:33:27,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 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 12:33:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-04 12:33:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-04 12:33:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-04 12:33:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-10-04 12:33:27,331 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 278 [2018-10-04 12:33:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:27,331 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-10-04 12:33:27,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:33:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-10-04 12:33:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-04 12:33:27,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:27,333 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:27,333 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:27,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -912183458, now seen corresponding path program 69 times [2018-10-04 12:33:27,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:27,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:27,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:27,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:27,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:29,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:29,172 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 12:33:29,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:29,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-04 12:33:29,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:29,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:29,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:29,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:33:29,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:33:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:33:29,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:33:29,400 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 72 states. [2018-10-04 12:33:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:29,680 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-04 12:33:29,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:33:29,681 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-10-04 12:33:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:29,683 INFO L225 Difference]: With dead ends: 289 [2018-10-04 12:33:29,683 INFO L226 Difference]: Without dead ends: 287 [2018-10-04 12:33:29,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 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 12:33:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-04 12:33:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-10-04 12:33:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-04 12:33:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-04 12:33:29,686 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 282 [2018-10-04 12:33:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:29,687 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-04 12:33:29,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:33:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-04 12:33:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-04 12:33:29,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:29,688 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:29,688 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:29,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1896899064, now seen corresponding path program 70 times [2018-10-04 12:33:29,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:29,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:29,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:29,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:31,524 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 12:33:31,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:31,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:31,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:31,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:31,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:33:31,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:33:31,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:33:31,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:33:31,691 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 73 states. [2018-10-04 12:33:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:31,905 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-10-04 12:33:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:33:31,906 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-10-04 12:33:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:31,907 INFO L225 Difference]: With dead ends: 293 [2018-10-04 12:33:31,907 INFO L226 Difference]: Without dead ends: 291 [2018-10-04 12:33:31,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:33:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-04 12:33:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-04 12:33:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-04 12:33:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-10-04 12:33:31,911 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 286 [2018-10-04 12:33:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:31,912 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-10-04 12:33:31,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:33:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-10-04 12:33:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-04 12:33:31,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:31,913 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:31,913 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:31,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash 347252658, now seen corresponding path program 71 times [2018-10-04 12:33:31,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:31,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:31,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:31,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:34,156 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 12:33:34,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:34,273 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-04 12:33:34,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:34,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:34,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:34,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:33:34,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:33:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:33:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:33:34,379 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 74 states. [2018-10-04 12:33:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:34,642 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-10-04 12:33:34,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:33:34,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-10-04 12:33:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:34,644 INFO L225 Difference]: With dead ends: 297 [2018-10-04 12:33:34,645 INFO L226 Difference]: Without dead ends: 295 [2018-10-04 12:33:34,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:33:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-04 12:33:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-04 12:33:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-04 12:33:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-10-04 12:33:34,648 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 290 [2018-10-04 12:33:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:34,648 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-10-04 12:33:34,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:33:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-10-04 12:33:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-04 12:33:34,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:34,650 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:34,650 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:34,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1994077092, now seen corresponding path program 72 times [2018-10-04 12:33:34,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:34,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:34,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:34,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:36,704 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 12:33:36,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:36,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-04 12:33:36,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:36,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:36,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:36,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:33:36,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:33:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:33:36,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:33:36,904 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 75 states. [2018-10-04 12:33:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:37,159 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-04 12:33:37,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:33:37,159 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-10-04 12:33:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:37,161 INFO L225 Difference]: With dead ends: 301 [2018-10-04 12:33:37,161 INFO L226 Difference]: Without dead ends: 299 [2018-10-04 12:33:37,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:33:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-04 12:33:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-04 12:33:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-04 12:33:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-04 12:33:37,164 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 294 [2018-10-04 12:33:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:37,165 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-04 12:33:37,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:33:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-04 12:33:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-04 12:33:37,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:37,166 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:37,166 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:37,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2034273286, now seen corresponding path program 73 times [2018-10-04 12:33:37,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:37,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:37,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:37,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:37,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:39,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:39,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:39,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:39,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:39,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:39,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:33:39,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:33:39,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:33:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:33:39,628 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 76 states. [2018-10-04 12:33:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:39,893 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-10-04 12:33:39,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:33:39,894 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-10-04 12:33:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:39,895 INFO L225 Difference]: With dead ends: 305 [2018-10-04 12:33:39,896 INFO L226 Difference]: Without dead ends: 303 [2018-10-04 12:33:39,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:33:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-04 12:33:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-10-04 12:33:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-04 12:33:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-10-04 12:33:39,899 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 298 [2018-10-04 12:33:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:39,899 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-10-04 12:33:39,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:33:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-10-04 12:33:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-04 12:33:39,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:39,901 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:39,901 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:39,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1891657392, now seen corresponding path program 74 times [2018-10-04 12:33:39,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:39,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:39,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:39,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:39,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:41,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:41,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:41,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:42,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:42,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:42,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:42,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:42,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:33:42,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:33:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:33:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:33:42,123 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 77 states. [2018-10-04 12:33:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:42,285 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-10-04 12:33:42,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:33:42,286 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-10-04 12:33:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:42,287 INFO L225 Difference]: With dead ends: 309 [2018-10-04 12:33:42,288 INFO L226 Difference]: Without dead ends: 307 [2018-10-04 12:33:42,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:33:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-04 12:33:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-04 12:33:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-04 12:33:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-10-04 12:33:42,291 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 302 [2018-10-04 12:33:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:42,292 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-10-04 12:33:42,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:33:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-10-04 12:33:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-04 12:33:42,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:42,293 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:42,294 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:42,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1709253542, now seen corresponding path program 75 times [2018-10-04 12:33:42,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:42,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:42,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:42,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:42,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:44,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:44,724 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 12:33:44,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:44,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-04 12:33:44,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:44,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:44,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:44,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:33:44,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:33:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:33:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:33:44,946 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 78 states. [2018-10-04 12:33:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:45,385 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-04 12:33:45,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:33:45,388 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-10-04 12:33:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:45,390 INFO L225 Difference]: With dead ends: 313 [2018-10-04 12:33:45,390 INFO L226 Difference]: Without dead ends: 311 [2018-10-04 12:33:45,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:33:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-04 12:33:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-10-04 12:33:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-04 12:33:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-04 12:33:45,394 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 306 [2018-10-04 12:33:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:45,394 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-04 12:33:45,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:33:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-04 12:33:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-04 12:33:45,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:45,397 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:45,397 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:45,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1586916612, now seen corresponding path program 76 times [2018-10-04 12:33:45,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:45,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:45,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:45,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:45,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:49,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:49,495 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 12:33:49,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:49,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:49,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:49,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:49,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:49,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:33:49,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:33:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:33:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:33:49,659 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 79 states. [2018-10-04 12:33:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:49,895 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-10-04 12:33:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:33:49,895 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-10-04 12:33:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:49,897 INFO L225 Difference]: With dead ends: 317 [2018-10-04 12:33:49,897 INFO L226 Difference]: Without dead ends: 315 [2018-10-04 12:33:49,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:33:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-04 12:33:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-04 12:33:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-04 12:33:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-10-04 12:33:49,901 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 310 [2018-10-04 12:33:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:49,902 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-10-04 12:33:49,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:33:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-10-04 12:33:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-04 12:33:49,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:49,903 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:49,903 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:49,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash 102865070, now seen corresponding path program 77 times [2018-10-04 12:33:49,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:49,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:49,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:49,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:49,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:52,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:52,140 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 12:33:52,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:52,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-04 12:33:52,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:52,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:52,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:52,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:33:52,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:33:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:33:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:33:52,366 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 80 states. [2018-10-04 12:33:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:52,543 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-10-04 12:33:52,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:33:52,544 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-10-04 12:33:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:52,545 INFO L225 Difference]: With dead ends: 321 [2018-10-04 12:33:52,545 INFO L226 Difference]: Without dead ends: 319 [2018-10-04 12:33:52,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:33:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-04 12:33:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-10-04 12:33:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-04 12:33:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-10-04 12:33:52,548 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 314 [2018-10-04 12:33:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:52,549 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-10-04 12:33:52,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:33:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-10-04 12:33:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-04 12:33:52,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:52,550 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:52,550 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:52,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670360, now seen corresponding path program 78 times [2018-10-04 12:33:52,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:52,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:52,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:52,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:52,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:55,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:55,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:33:55,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:55,244 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-04 12:33:55,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:55,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:55,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:55,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:33:55,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:33:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:33:55,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:33:55,362 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 81 states. [2018-10-04 12:33:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:55,549 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-04 12:33:55,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:33:55,550 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-10-04 12:33:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:55,551 INFO L225 Difference]: With dead ends: 325 [2018-10-04 12:33:55,551 INFO L226 Difference]: Without dead ends: 323 [2018-10-04 12:33:55,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:33:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-04 12:33:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-04 12:33:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-04 12:33:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-10-04 12:33:55,554 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 318 [2018-10-04 12:33:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:55,554 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-10-04 12:33:55,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:33:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-10-04 12:33:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-04 12:33:55,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:55,555 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:55,556 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:55,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash 941408514, now seen corresponding path program 79 times [2018-10-04 12:33:55,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:55,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:55,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:55,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:55,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:58,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:58,026 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 12:33:58,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:58,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:58,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:58,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:33:58,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:33:58,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:33:58,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:33:58,208 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 82 states. [2018-10-04 12:33:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:58,385 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-10-04 12:33:58,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:33:58,385 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-10-04 12:33:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:58,387 INFO L225 Difference]: With dead ends: 329 [2018-10-04 12:33:58,387 INFO L226 Difference]: Without dead ends: 327 [2018-10-04 12:33:58,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:33:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-04 12:33:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-10-04 12:33:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-10-04 12:33:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-10-04 12:33:58,391 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 322 [2018-10-04 12:33:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:58,392 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-10-04 12:33:58,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:33:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-10-04 12:33:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-04 12:33:58,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:58,393 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-04 12:33:58,393 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:58,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1279376812, now seen corresponding path program 80 times [2018-10-04 12:33:58,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:58,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:58,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:58,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:58,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:00,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:00,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:00,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:00,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:00,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:00,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:00,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:00,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:34:00,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:34:00,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:34:00,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:34:00,955 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 83 states. [2018-10-04 12:34:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:01,308 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-10-04 12:34:01,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:34:01,309 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-10-04 12:34:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:01,311 INFO L225 Difference]: With dead ends: 333 [2018-10-04 12:34:01,311 INFO L226 Difference]: Without dead ends: 331 [2018-10-04 12:34:01,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:34:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-04 12:34:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-04 12:34:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-04 12:34:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-10-04 12:34:01,315 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 326 [2018-10-04 12:34:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:01,315 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-10-04 12:34:01,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:34:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-10-04 12:34:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-04 12:34:01,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:01,317 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:01,317 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:01,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1763420842, now seen corresponding path program 81 times [2018-10-04 12:34:01,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:01,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:01,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:01,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:01,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:04,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:04,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:04,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:04,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-04 12:34:04,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:04,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:04,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:04,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:34:04,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:34:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:34:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:34:04,336 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 84 states. [2018-10-04 12:34:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:04,607 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-10-04 12:34:04,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:34:04,608 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-10-04 12:34:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:04,610 INFO L225 Difference]: With dead ends: 337 [2018-10-04 12:34:04,610 INFO L226 Difference]: Without dead ends: 335 [2018-10-04 12:34:04,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:34:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-10-04 12:34:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-10-04 12:34:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-04 12:34:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-10-04 12:34:04,614 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 330 [2018-10-04 12:34:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:04,614 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-10-04 12:34:04,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:34:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-10-04 12:34:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-04 12:34:04,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:04,615 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:04,615 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:04,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash 431949824, now seen corresponding path program 82 times [2018-10-04 12:34:04,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:04,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:04,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:04,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:04,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:07,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:07,164 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 12:34:07,174 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:07,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:07,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:07,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:07,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:07,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:34:07,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:34:07,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:34:07,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:34:07,391 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 85 states. [2018-10-04 12:34:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:07,765 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-10-04 12:34:07,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:34:07,766 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-10-04 12:34:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:07,767 INFO L225 Difference]: With dead ends: 341 [2018-10-04 12:34:07,767 INFO L226 Difference]: Without dead ends: 339 [2018-10-04 12:34:07,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:34:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-04 12:34:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-04 12:34:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-04 12:34:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-10-04 12:34:07,771 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 334 [2018-10-04 12:34:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:07,772 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-10-04 12:34:07,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:34:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-10-04 12:34:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-04 12:34:07,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:07,773 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:07,773 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:07,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1967936938, now seen corresponding path program 83 times [2018-10-04 12:34:07,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:07,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:07,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:07,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:10,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:10,672 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 12:34:10,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:10,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-04 12:34:10,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:10,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:10,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:10,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:34:10,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:34:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:34:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:34:10,931 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 86 states. [2018-10-04 12:34:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:11,213 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-10-04 12:34:11,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:34:11,213 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-10-04 12:34:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:11,215 INFO L225 Difference]: With dead ends: 345 [2018-10-04 12:34:11,215 INFO L226 Difference]: Without dead ends: 343 [2018-10-04 12:34:11,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:34:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-04 12:34:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-10-04 12:34:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-04 12:34:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-10-04 12:34:11,218 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 338 [2018-10-04 12:34:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:11,218 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-10-04 12:34:11,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:34:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-10-04 12:34:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-04 12:34:11,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:11,221 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:11,221 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:11,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2000241068, now seen corresponding path program 84 times [2018-10-04 12:34:11,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:11,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:11,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:11,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:14,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:14,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:14,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:14,194 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-04 12:34:14,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:14,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:14,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:14,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:34:14,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:34:14,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:34:14,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:34:14,321 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 87 states. [2018-10-04 12:34:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:14,688 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-10-04 12:34:14,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:34:14,689 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-10-04 12:34:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:14,690 INFO L225 Difference]: With dead ends: 349 [2018-10-04 12:34:14,691 INFO L226 Difference]: Without dead ends: 347 [2018-10-04 12:34:14,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:34:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-04 12:34:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-10-04 12:34:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-04 12:34:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-10-04 12:34:14,695 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 342 [2018-10-04 12:34:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:14,695 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-10-04 12:34:14,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:34:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-10-04 12:34:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-04 12:34:14,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:14,697 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:14,698 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:14,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash 304660990, now seen corresponding path program 85 times [2018-10-04 12:34:14,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:14,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:14,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:14,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:14,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:17,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:17,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:17,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:17,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:17,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:17,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:34:17,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:34:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:34:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:34:17,622 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 88 states. [2018-10-04 12:34:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:17,951 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-10-04 12:34:17,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:34:17,951 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-10-04 12:34:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:17,953 INFO L225 Difference]: With dead ends: 353 [2018-10-04 12:34:17,953 INFO L226 Difference]: Without dead ends: 351 [2018-10-04 12:34:17,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:34:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-04 12:34:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-10-04 12:34:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-10-04 12:34:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-10-04 12:34:17,956 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 346 [2018-10-04 12:34:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:17,957 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-10-04 12:34:17,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:34:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-10-04 12:34:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-04 12:34:17,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:17,958 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:17,958 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:17,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1311563944, now seen corresponding path program 86 times [2018-10-04 12:34:17,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:17,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:17,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:17,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:17,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:21,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:21,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:21,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:21,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:21,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:21,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:21,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:21,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:34:21,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:34:21,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:34:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:34:21,380 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 89 states. [2018-10-04 12:34:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:21,788 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-10-04 12:34:21,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:34:21,789 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-10-04 12:34:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:21,790 INFO L225 Difference]: With dead ends: 357 [2018-10-04 12:34:21,791 INFO L226 Difference]: Without dead ends: 355 [2018-10-04 12:34:21,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:34:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-04 12:34:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-10-04 12:34:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-04 12:34:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-10-04 12:34:21,794 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 350 [2018-10-04 12:34:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:21,795 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-10-04 12:34:21,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:34:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-10-04 12:34:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-04 12:34:21,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:21,796 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:21,796 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:21,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1739744686, now seen corresponding path program 87 times [2018-10-04 12:34:21,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:21,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:21,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:21,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:21,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:24,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:24,943 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 12:34:24,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:25,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-04 12:34:25,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:25,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:25,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:25,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:34:25,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:34:25,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:34:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:34:25,209 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 90 states. [2018-10-04 12:34:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:25,430 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-10-04 12:34:25,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:34:25,430 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-10-04 12:34:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:25,432 INFO L225 Difference]: With dead ends: 361 [2018-10-04 12:34:25,432 INFO L226 Difference]: Without dead ends: 359 [2018-10-04 12:34:25,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:34:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-10-04 12:34:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-10-04 12:34:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-04 12:34:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-10-04 12:34:25,435 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 354 [2018-10-04 12:34:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:25,435 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-10-04 12:34:25,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:34:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-10-04 12:34:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-04 12:34:25,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:25,437 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:25,437 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:25,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:25,437 INFO L82 PathProgramCache]: Analyzing trace with hash 180711164, now seen corresponding path program 88 times [2018-10-04 12:34:25,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:25,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:25,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:25,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:25,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:28,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:28,338 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 12:34:28,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:28,425 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:28,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:28,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:28,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:28,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:34:28,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:34:28,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:34:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:34:28,571 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 91 states. [2018-10-04 12:34:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:28,974 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-10-04 12:34:28,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:34:28,975 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-10-04 12:34:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:28,976 INFO L225 Difference]: With dead ends: 365 [2018-10-04 12:34:28,976 INFO L226 Difference]: Without dead ends: 363 [2018-10-04 12:34:28,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:34:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-04 12:34:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-10-04 12:34:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-10-04 12:34:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-10-04 12:34:28,979 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 358 [2018-10-04 12:34:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:28,980 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-10-04 12:34:28,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:34:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-10-04 12:34:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-04 12:34:28,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:28,981 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:28,981 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:28,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:28,982 INFO L82 PathProgramCache]: Analyzing trace with hash 512679590, now seen corresponding path program 89 times [2018-10-04 12:34:28,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:28,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:28,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:28,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:28,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:31,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:31,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:31,946 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:32,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-04 12:34:32,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:32,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:32,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:32,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:34:32,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:34:32,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:34:32,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:34:32,218 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 92 states. [2018-10-04 12:34:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:32,664 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-10-04 12:34:32,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:34:32,665 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 362 [2018-10-04 12:34:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:32,667 INFO L225 Difference]: With dead ends: 369 [2018-10-04 12:34:32,667 INFO L226 Difference]: Without dead ends: 367 [2018-10-04 12:34:32,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:34:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-10-04 12:34:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-10-04 12:34:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-10-04 12:34:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-10-04 12:34:32,671 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 362 [2018-10-04 12:34:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:32,671 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-10-04 12:34:32,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:34:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-10-04 12:34:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-04 12:34:32,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:32,673 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:32,673 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:32,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1264871760, now seen corresponding path program 90 times [2018-10-04 12:34:32,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:32,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:32,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:32,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:32,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:35,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:35,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:35,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:34:36,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-04 12:34:36,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:36,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:36,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:36,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 12:34:36,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:34:36,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:34:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:34:36,250 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 93 states. [2018-10-04 12:34:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:36,629 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-10-04 12:34:36,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:34:36,630 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 366 [2018-10-04 12:34:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:36,631 INFO L225 Difference]: With dead ends: 373 [2018-10-04 12:34:36,631 INFO L226 Difference]: Without dead ends: 371 [2018-10-04 12:34:36,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:34:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-10-04 12:34:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-10-04 12:34:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-10-04 12:34:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-10-04 12:34:36,634 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 366 [2018-10-04 12:34:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:36,635 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-10-04 12:34:36,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:34:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-10-04 12:34:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-10-04 12:34:36,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:36,636 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:36,636 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:36,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1480552710, now seen corresponding path program 91 times [2018-10-04 12:34:36,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:36,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:36,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:36,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:36,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:39,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:39,904 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 12:34:39,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:39,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:40,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:40,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:34:40,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:34:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:34:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:34:40,118 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 94 states. [2018-10-04 12:34:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:40,591 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-10-04 12:34:40,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:34:40,592 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 370 [2018-10-04 12:34:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:40,594 INFO L225 Difference]: With dead ends: 377 [2018-10-04 12:34:40,594 INFO L226 Difference]: Without dead ends: 375 [2018-10-04 12:34:40,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:34:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-04 12:34:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-10-04 12:34:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-10-04 12:34:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-10-04 12:34:40,598 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 370 [2018-10-04 12:34:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:40,598 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-10-04 12:34:40,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:34:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-10-04 12:34:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-04 12:34:40,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:40,600 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:40,600 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:40,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:40,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1998729308, now seen corresponding path program 92 times [2018-10-04 12:34:40,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:40,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:40,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:40,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:34:40,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:44,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:44,717 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 12:34:44,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:34:44,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:34:44,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:44,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:44,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:44,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 12:34:44,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:34:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:34:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:34:44,927 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 95 states. [2018-10-04 12:34:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:45,377 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-10-04 12:34:45,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:34:45,377 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 374 [2018-10-04 12:34:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:45,379 INFO L225 Difference]: With dead ends: 381 [2018-10-04 12:34:45,379 INFO L226 Difference]: Without dead ends: 379 [2018-10-04 12:34:45,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:34:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-10-04 12:34:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-10-04 12:34:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-10-04 12:34:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-10-04 12:34:45,383 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 374 [2018-10-04 12:34:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:45,384 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-10-04 12:34:45,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:34:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-10-04 12:34:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-10-04 12:34:45,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:45,385 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:45,385 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:45,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash 582396750, now seen corresponding path program 93 times [2018-10-04 12:34:45,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:45,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:45,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:45,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:45,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:48,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:48,607 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 12:34:48,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:34:48,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-04 12:34:48,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:48,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:48,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:48,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:34:48,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:34:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:34:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:34:48,922 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 96 states. [2018-10-04 12:34:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:49,174 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-10-04 12:34:49,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:34:49,174 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 378 [2018-10-04 12:34:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:49,176 INFO L225 Difference]: With dead ends: 385 [2018-10-04 12:34:49,176 INFO L226 Difference]: Without dead ends: 383 [2018-10-04 12:34:49,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:34:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-10-04 12:34:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-10-04 12:34:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-10-04 12:34:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-10-04 12:34:49,179 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 378 [2018-10-04 12:34:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:49,179 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-10-04 12:34:49,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:34:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-10-04 12:34:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-10-04 12:34:49,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:49,181 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:49,181 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:49,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 671457784, now seen corresponding path program 94 times [2018-10-04 12:34:49,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:49,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:49,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:49,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:49,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:52,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:52,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:34:52,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:34:52,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:34:52,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:52,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:52,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:52,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 12:34:52,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:34:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:34:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:34:52,791 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 97 states. [2018-10-04 12:34:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:53,296 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-10-04 12:34:53,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:34:53,296 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 382 [2018-10-04 12:34:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:53,298 INFO L225 Difference]: With dead ends: 389 [2018-10-04 12:34:53,298 INFO L226 Difference]: Without dead ends: 387 [2018-10-04 12:34:53,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:34:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-04 12:34:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-10-04 12:34:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-10-04 12:34:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-10-04 12:34:53,302 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 382 [2018-10-04 12:34:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:53,303 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-10-04 12:34:53,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:34:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-10-04 12:34:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-10-04 12:34:53,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:53,304 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:53,304 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:53,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:53,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1782920098, now seen corresponding path program 95 times [2018-10-04 12:34:53,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:53,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:53,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:53,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:53,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:34:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:56,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:34:56,848 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 12:34:56,858 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:34:57,020 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-04 12:34:57,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:34:57,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:34:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:34:57,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:34:57,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:34:57,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:34:57,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:34:57,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:34:57,161 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 98 states. [2018-10-04 12:34:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:34:57,686 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-10-04 12:34:57,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:34:57,687 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 386 [2018-10-04 12:34:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:34:57,689 INFO L225 Difference]: With dead ends: 393 [2018-10-04 12:34:57,689 INFO L226 Difference]: Without dead ends: 391 [2018-10-04 12:34:57,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:34:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-10-04 12:34:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-10-04 12:34:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-10-04 12:34:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-10-04 12:34:57,693 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 386 [2018-10-04 12:34:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:34:57,693 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-10-04 12:34:57,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:34:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-10-04 12:34:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-10-04 12:34:57,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:34:57,695 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-04 12:34:57,695 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:34:57,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:34:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2041569356, now seen corresponding path program 96 times [2018-10-04 12:34:57,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:34:57,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:34:57,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:57,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:34:57,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:34:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:01,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:01,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:35:01,425 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:01,579 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-04 12:35:01,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:01,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:01,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:01,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 12:35:01,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 12:35:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 12:35:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:35:01,722 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 99 states. [2018-10-04 12:35:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:02,210 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-10-04 12:35:02,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:35:02,210 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 390 [2018-10-04 12:35:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:02,212 INFO L225 Difference]: With dead ends: 397 [2018-10-04 12:35:02,212 INFO L226 Difference]: Without dead ends: 395 [2018-10-04 12:35:02,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:35:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-10-04 12:35:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-10-04 12:35:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-10-04 12:35:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-10-04 12:35:02,217 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 390 [2018-10-04 12:35:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:02,217 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-10-04 12:35:02,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 12:35:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-10-04 12:35:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-04 12:35:02,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:02,219 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:02,219 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:02,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1161832438, now seen corresponding path program 97 times [2018-10-04 12:35:02,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:02,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:02,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:02,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:02,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:06,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:06,040 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 12:35:06,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:06,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:06,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:06,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 12:35:06,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:35:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:35:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:35:06,265 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 100 states. [2018-10-04 12:35:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:06,822 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-10-04 12:35:06,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:35:06,822 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 394 [2018-10-04 12:35:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:06,825 INFO L225 Difference]: With dead ends: 401 [2018-10-04 12:35:06,825 INFO L226 Difference]: Without dead ends: 399 [2018-10-04 12:35:06,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:35:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-04 12:35:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-10-04 12:35:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-10-04 12:35:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-10-04 12:35:06,829 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 394 [2018-10-04 12:35:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:06,829 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-10-04 12:35:06,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:35:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-10-04 12:35:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-10-04 12:35:06,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:06,831 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:06,831 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:06,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:06,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1162835296, now seen corresponding path program 98 times [2018-10-04 12:35:06,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:06,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:06,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:06,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:06,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:10,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:10,659 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 12:35:10,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:10,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:10,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:10,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:10,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:10,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 12:35:10,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 12:35:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 12:35:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:35:10,892 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 101 states. [2018-10-04 12:35:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:11,430 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-10-04 12:35:11,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:35:11,430 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 398 [2018-10-04 12:35:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:11,432 INFO L225 Difference]: With dead ends: 405 [2018-10-04 12:35:11,433 INFO L226 Difference]: Without dead ends: 403 [2018-10-04 12:35:11,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:35:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-10-04 12:35:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-10-04 12:35:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-10-04 12:35:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-10-04 12:35:11,436 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 398 [2018-10-04 12:35:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:11,437 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-10-04 12:35:11,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 12:35:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-10-04 12:35:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-10-04 12:35:11,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:11,439 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:11,439 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:11,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1719371850, now seen corresponding path program 99 times [2018-10-04 12:35:11,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:11,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:11,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:11,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:11,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:15,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:15,391 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 12:35:15,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:15,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-04 12:35:15,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:15,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:15,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:15,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 12:35:15,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:35:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:35:15,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:35:15,736 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 102 states. [2018-10-04 12:35:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:16,067 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-10-04 12:35:16,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 12:35:16,068 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 402 [2018-10-04 12:35:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:16,070 INFO L225 Difference]: With dead ends: 409 [2018-10-04 12:35:16,070 INFO L226 Difference]: Without dead ends: 407 [2018-10-04 12:35:16,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:35:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-10-04 12:35:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-10-04 12:35:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-04 12:35:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-10-04 12:35:16,075 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 402 [2018-10-04 12:35:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:16,075 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-10-04 12:35:16,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:35:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-10-04 12:35:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-04 12:35:16,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:16,078 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:16,078 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:16,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash 333160692, now seen corresponding path program 100 times [2018-10-04 12:35:16,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:16,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:16,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:16,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:16,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:19,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:19,996 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 12:35:20,003 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:20,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:20,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:20,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:20,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:20,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 12:35:20,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 12:35:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 12:35:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:35:20,262 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 103 states. [2018-10-04 12:35:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:20,835 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-10-04 12:35:20,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:35:20,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 406 [2018-10-04 12:35:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:20,838 INFO L225 Difference]: With dead ends: 413 [2018-10-04 12:35:20,838 INFO L226 Difference]: Without dead ends: 411 [2018-10-04 12:35:20,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:35:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-10-04 12:35:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-10-04 12:35:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-10-04 12:35:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-10-04 12:35:20,843 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 406 [2018-10-04 12:35:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:20,844 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-10-04 12:35:20,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 12:35:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-10-04 12:35:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-04 12:35:20,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:20,846 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:20,846 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:20,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:20,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1825264798, now seen corresponding path program 101 times [2018-10-04 12:35:20,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:20,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:20,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:20,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:20,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:24,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:24,914 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 12:35:24,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:25,107 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-04 12:35:25,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:25,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:25,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:25,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 12:35:25,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:35:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:35:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:35:25,315 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 104 states. [2018-10-04 12:35:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:25,917 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-10-04 12:35:25,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 12:35:25,917 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 410 [2018-10-04 12:35:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:25,919 INFO L225 Difference]: With dead ends: 417 [2018-10-04 12:35:25,919 INFO L226 Difference]: Without dead ends: 415 [2018-10-04 12:35:25,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:35:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-10-04 12:35:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-10-04 12:35:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-10-04 12:35:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-10-04 12:35:25,924 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 410 [2018-10-04 12:35:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:25,925 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-10-04 12:35:25,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:35:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-10-04 12:35:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-10-04 12:35:25,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:25,927 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:25,927 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:25,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1710939320, now seen corresponding path program 102 times [2018-10-04 12:35:25,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:25,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:25,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:25,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:25,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:29,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:29,837 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 12:35:29,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:35:30,055 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-04 12:35:30,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:30,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:30,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:30,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 12:35:30,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 12:35:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 12:35:30,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 12:35:30,234 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 105 states. [2018-10-04 12:35:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:30,767 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-10-04 12:35:30,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 12:35:30,768 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 414 [2018-10-04 12:35:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:30,769 INFO L225 Difference]: With dead ends: 421 [2018-10-04 12:35:30,769 INFO L226 Difference]: Without dead ends: 419 [2018-10-04 12:35:30,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 12:35:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-10-04 12:35:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-10-04 12:35:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-10-04 12:35:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-10-04 12:35:30,774 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 414 [2018-10-04 12:35:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:30,774 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-10-04 12:35:30,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 12:35:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-10-04 12:35:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-10-04 12:35:30,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:30,776 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:30,776 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:30,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash -486306574, now seen corresponding path program 103 times [2018-10-04 12:35:30,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:30,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:30,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:30,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:30,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:34,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:34,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:35:34,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:35,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:35,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:35,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 12:35:35,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 12:35:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 12:35:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:35:35,234 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 106 states. [2018-10-04 12:35:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:35,816 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-10-04 12:35:35,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 12:35:35,817 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 418 [2018-10-04 12:35:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:35,818 INFO L225 Difference]: With dead ends: 425 [2018-10-04 12:35:35,818 INFO L226 Difference]: Without dead ends: 423 [2018-10-04 12:35:35,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:35:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-04 12:35:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-10-04 12:35:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-10-04 12:35:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-10-04 12:35:35,823 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 418 [2018-10-04 12:35:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:35,823 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-10-04 12:35:35,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 12:35:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-10-04 12:35:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-04 12:35:35,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:35,826 INFO L375 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:35,826 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:35,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:35,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1308692892, now seen corresponding path program 104 times [2018-10-04 12:35:35,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:35,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:35,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:35,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:35:35,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:39,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:39,793 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 12:35:39,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:35:39,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:35:39,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:39,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:40,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:40,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 12:35:40,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 12:35:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 12:35:40,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:35:40,090 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 107 states. [2018-10-04 12:35:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:40,726 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-10-04 12:35:40,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 12:35:40,727 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 422 [2018-10-04 12:35:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:40,728 INFO L225 Difference]: With dead ends: 429 [2018-10-04 12:35:40,728 INFO L226 Difference]: Without dead ends: 427 [2018-10-04 12:35:40,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:35:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-04 12:35:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-10-04 12:35:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-10-04 12:35:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-10-04 12:35:40,732 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 422 [2018-10-04 12:35:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:40,732 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-10-04 12:35:40,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 12:35:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-10-04 12:35:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-10-04 12:35:40,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:40,734 INFO L375 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:40,734 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:40,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1073230150, now seen corresponding path program 105 times [2018-10-04 12:35:40,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:40,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:40,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:40,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:40,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:44,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:44,801 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 12:35:44,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:35:45,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-04 12:35:45,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:45,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:45,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:45,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 12:35:45,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 12:35:45,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 12:35:45,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:35:45,205 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 108 states. [2018-10-04 12:35:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:45,633 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-10-04 12:35:45,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 12:35:45,633 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 426 [2018-10-04 12:35:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:45,634 INFO L225 Difference]: With dead ends: 433 [2018-10-04 12:35:45,634 INFO L226 Difference]: Without dead ends: 431 [2018-10-04 12:35:45,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 12:35:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-10-04 12:35:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-10-04 12:35:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-10-04 12:35:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-10-04 12:35:45,638 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 426 [2018-10-04 12:35:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:45,638 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-10-04 12:35:45,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 12:35:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-10-04 12:35:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-10-04 12:35:45,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:45,640 INFO L375 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:45,640 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:45,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:45,640 INFO L82 PathProgramCache]: Analyzing trace with hash 480472048, now seen corresponding path program 106 times [2018-10-04 12:35:45,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:45,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:45,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:45,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:45,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:49,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:49,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:35:49,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:35:49,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:35:49,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:49,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:50,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:50,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 12:35:50,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 12:35:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 12:35:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 12:35:50,117 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 109 states. [2018-10-04 12:35:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:50,803 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-10-04 12:35:50,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 12:35:50,804 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 430 [2018-10-04 12:35:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:50,805 INFO L225 Difference]: With dead ends: 437 [2018-10-04 12:35:50,805 INFO L226 Difference]: Without dead ends: 435 [2018-10-04 12:35:50,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 12:35:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-10-04 12:35:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-10-04 12:35:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-10-04 12:35:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-10-04 12:35:50,808 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 430 [2018-10-04 12:35:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:50,808 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-10-04 12:35:50,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 12:35:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-10-04 12:35:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-10-04 12:35:50,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:50,810 INFO L375 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:50,810 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:50,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash -427998822, now seen corresponding path program 107 times [2018-10-04 12:35:50,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:50,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:50,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:50,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:35:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:35:55,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:35:55,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:35:55,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-04 12:35:55,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:35:55,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:35:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:35:55,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:35:55,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 12:35:55,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 12:35:55,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 12:35:55,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:35:55,437 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 110 states. [2018-10-04 12:35:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:35:55,950 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-10-04 12:35:55,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 12:35:55,951 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 434 [2018-10-04 12:35:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:35:55,952 INFO L225 Difference]: With dead ends: 441 [2018-10-04 12:35:55,952 INFO L226 Difference]: Without dead ends: 439 [2018-10-04 12:35:55,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:35:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-10-04 12:35:55,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-10-04 12:35:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-10-04 12:35:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-10-04 12:35:55,955 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 434 [2018-10-04 12:35:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:35:55,955 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-10-04 12:35:55,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 12:35:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-10-04 12:35:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-10-04 12:35:55,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:35:55,957 INFO L375 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1] [2018-10-04 12:35:55,957 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:35:55,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:35:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -557829564, now seen corresponding path program 108 times [2018-10-04 12:35:55,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:35:55,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:35:55,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:55,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:35:55,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:35:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 12:35:57,392 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:35:57,397 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:35:57,397 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:35:57 BoogieIcfgContainer [2018-10-04 12:35:57,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:35:57,398 INFO L168 Benchmark]: Toolchain (without parser) took 234894.93 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 115.3 MB). Free memory was 1.4 GB in the beginning and 992.7 MB in the end (delta: 452.5 MB). Peak memory consumption was 567.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:35:57,401 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:35:57,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:35:57,402 INFO L168 Benchmark]: Boogie Preprocessor took 25.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:35:57,402 INFO L168 Benchmark]: RCFGBuilder took 289.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:35:57,402 INFO L168 Benchmark]: TraceAbstraction took 234530.66 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 115.3 MB). Free memory was 1.4 GB in the beginning and 992.7 MB in the end (delta: 431.4 MB). Peak memory consumption was 546.7 MB. Max. memory is 7.1 GB. [2018-10-04 12:35:57,404 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 0.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 289.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234530.66 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 115.3 MB). Free memory was 1.4 GB in the beginning and 992.7 MB in the end (delta: 431.4 MB). Peak memory consumption was 546.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 439 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 63 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 234.4s OverallTime, 110 OverallIterations, 108 TraceHistogramMax, 27.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 981 SDtfs, 582 SDslu, 21211 SDs, 0 SdLazy, 9551 SolverSat, 193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29643 GetRequests, 23756 SyntacticMatches, 0 SemanticMatches, 5887 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 176.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=439occurred in iteration=109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 109 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 186.8s InterpolantComputationTime, 47520 NumberOfCodeBlocks, 47520 NumberOfCodeBlocksAsserted, 3150 NumberOfCheckSat, 47304 ConstructedInterpolants, 0 QuantifiedInterpolants, 41060932 SizeOfPredicates, 107 NumberOfNonLiveVariables, 35952 ConjunctsInSsa, 5992 ConjunctsInUnsatCore, 216 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1644804 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/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-35-57-414.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-35-57-414.csv Completed graceful shutdown