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/LuxembourgOctopus.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:54:03,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:54:03,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:54:03,522 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:54:03,522 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:54:03,524 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:54:03,525 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:54:03,528 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:54:03,529 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:54:03,530 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:54:03,531 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:54:03,556 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 [2018-10-03 08:54:03,582 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:54:03,582 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:54:03,583 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:54:03,583 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:54:03,583 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:54:03,584 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:54:03,584 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:54:03,584 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:54:03,584 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:54:03,585 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:54:03,585 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:54:03,586 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:54:03,586 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:54:03,586 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:54:03,586 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:54:03,586 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:54:03,587 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:54:03,587 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:54:03,587 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:54:03,587 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:54:03,588 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:54:03,588 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:54:03,588 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:54:03,588 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:54:03,589 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:54:03,589 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:54:03,589 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:54:03,589 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:54:03,589 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:54:03,590 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:54:03,648 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:54:03,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:54:03,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:54:03,668 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:54:03,669 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:54:03,669 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-10-03 08:54:03,670 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-10-03 08:54:03,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:54:03,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:54:03,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:54:03,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:54:03,725 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:54:03,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,761 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:54:03,762 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:54:03,762 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:54:03,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:54:03,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:54:03,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:54:03,765 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:54:03,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/1) ... [2018-10-03 08:54:03,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:54:03,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:54:03,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:54:03,787 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:54:03,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (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 [2018-10-03 08:54:03,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 08:54:03,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 08:54:03,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 08:54:04,094 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:54:04,095 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:54:04 BoogieIcfgContainer [2018-10-03 08:54:04,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:54:04,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:54:04,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:54:04,100 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:54:04,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:03" (1/2) ... [2018-10-03 08:54:04,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e3884 and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:54:04, skipping insertion in model container [2018-10-03 08:54:04,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:54:04" (2/2) ... [2018-10-03 08:54:04,104 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-10-03 08:54:04,115 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:54:04,128 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:54:04,184 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:54:04,185 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:54:04,185 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:54:04,185 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:54:04,185 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:54:04,186 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:54:04,186 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:54:04,186 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:54:04,186 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:54:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 08:54:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:54:04,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:04,214 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:54:04,215 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:04,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-03 08:54:04,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:04,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:04,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:04,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,362 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:54:04,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:54:04,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:54:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:54:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:54:04,385 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-03 08:54:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:04,447 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-03 08:54:04,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:54:04,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 08:54:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:04,460 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:54:04,460 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 08:54:04,464 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 [2018-10-03 08:54:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 08:54:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 08:54:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 08:54:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 08:54:04,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 08:54:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:04,501 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 08:54:04,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:54:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 08:54:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:54:04,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:04,502 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:54:04,502 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:04,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-03 08:54:04,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:04,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:04,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:04,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:04,650 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 [2018-10-03 08:54:04,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:04,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:04,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-10-03 08:54:04,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:54:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:54:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:54:04,858 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-03 08:54:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:04,964 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 08:54:04,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:54:04,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-03 08:54:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:04,967 INFO L225 Difference]: With dead ends: 8 [2018-10-03 08:54:04,967 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:54:04,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:54:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:54:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:54:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:54:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:54:04,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:54:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:04,975 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:54:04,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:54:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:54:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:54:04,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:04,976 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-03 08:54:04,976 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:04,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-03 08:54:04,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:04,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:04,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:04,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,055 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 [2018-10-03 08:54:05,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:05,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:05,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-03 08:54:05,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:54:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:54:05,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:54:05,148 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-03 08:54:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:05,222 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:54:05,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:54:05,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-03 08:54:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:05,223 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:54:05,223 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:54:05,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:54:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:54:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:54:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:54:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:54:05,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:54:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:05,227 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:54:05,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:54:05,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:54:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:54:05,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:05,229 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-03 08:54:05,229 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:05,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:05,230 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-03 08:54:05,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:05,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:05,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:05,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,349 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 [2018-10-03 08:54:05,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:05,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:54:05,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-03 08:54:05,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:54:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:54:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:54:05,471 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-03 08:54:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:05,516 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:54:05,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:54:05,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-03 08:54:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:05,517 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:54:05,517 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:54:05,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:54:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:54:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:54:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:54:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:54:05,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:54:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:05,521 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:54:05,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:54:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:54:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:54:05,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:05,522 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-03 08:54:05,523 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:05,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-03 08:54:05,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:05,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:05,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:05,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,813 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 [2018-10-03 08:54:05,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:05,833 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:05,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-03 08:54:05,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:54:05,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:54:05,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:54:05,877 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-03 08:54:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:05,925 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:54:05,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:54:05,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-03 08:54:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:05,926 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:54:05,927 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:54:05,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:54:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:54:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:54:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:54:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:54:05,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:54:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:05,933 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:54:05,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:54:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:54:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:54:05,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:05,933 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-03 08:54:05,934 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:05,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-03 08:54:05,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:05,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:05,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:06,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:06,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:06,156 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:54:06,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:06,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:06,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-03 08:54:06,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:06,206 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-03 08:54:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:06,231 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:54:06,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:54:06,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-03 08:54:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:06,233 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:54:06,233 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:54:06,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:54:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:54:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:54:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:54:06,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:54:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:06,242 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:54:06,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:54:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:54:06,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:06,243 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-03 08:54:06,243 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:06,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-03 08:54:06,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:06,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:06,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:06,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:06,349 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 [2018-10-03 08:54:06,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:06,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:54:06,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:06,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:06,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-03 08:54:06,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:06,423 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-03 08:54:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:06,454 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:54:06,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:06,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-03 08:54:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:06,456 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:54:06,456 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:54:06,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:54:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:54:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:54:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:54:06,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:54:06,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:06,461 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:54:06,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:54:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:54:06,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:06,462 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-03 08:54:06,462 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:06,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-03 08:54:06,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:06,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:06,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:06,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:06,934 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 [2018-10-03 08:54:06,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:06,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-03 08:54:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:54:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:54:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:54:06,989 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-03 08:54:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:07,047 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:54:07,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:07,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-03 08:54:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:07,050 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:54:07,051 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:54:07,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:54:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:54:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:54:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:54:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:54:07,055 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:54:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,055 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:54:07,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:54:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:54:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:54:07,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,056 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-03 08:54:07,056 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-03 08:54:07,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:07,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:07,213 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 [2018-10-03 08:54:07,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:07,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:07,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:07,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:07,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-03 08:54:07,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:54:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:54:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:54:07,274 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-03 08:54:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:07,340 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:54:07,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:54:07,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-03 08:54:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:07,341 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:54:07,341 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:54:07,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:54:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:54:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:54:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:54:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:54:07,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:54:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,345 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:54:07,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:54:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:54:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:54:07,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,346 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-03 08:54:07,347 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-03 08:54:07,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:07,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:07,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:07,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:07,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:54:07,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:07,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:07,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-03 08:54:07,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:54:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:54:07,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:54:07,743 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-03 08:54:07,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:07,796 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:54:07,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:54:07,796 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-03 08:54:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:07,797 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:54:07,798 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:54:07,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:54:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:54:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:54:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:54:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:54:07,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:54:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,803 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:54:07,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:54:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:54:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:54:07,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,804 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-03 08:54:07,805 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-03 08:54:07,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:07,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:08,062 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 [2018-10-03 08:54:08,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:08,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:08,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:08,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:08,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-03 08:54:08,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:54:08,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:54:08,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:54:08,123 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-03 08:54:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:08,159 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:54:08,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:54:08,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-03 08:54:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:08,161 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:54:08,161 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:54:08,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:54:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:54:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:54:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:54:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:54:08,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:54:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:54:08,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:54:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:54:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:54:08,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:08,168 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-03 08:54:08,168 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:08,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-03 08:54:08,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:08,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:08,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:08,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:08,342 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 [2018-10-03 08:54:08,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:08,384 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:54:08,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:08,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:08,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-03 08:54:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:54:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:54:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:54:08,431 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-03 08:54:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:08,496 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:54:08,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:54:08,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-03 08:54:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:08,499 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:54:08,499 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:54:08,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:54:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:54:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:54:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:54:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:54:08,502 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:54:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:08,503 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:54:08,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:54:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:54:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:08,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:08,504 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-03 08:54:08,504 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:08,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:08,504 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-03 08:54:08,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:08,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:08,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:08,701 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 [2018-10-03 08:54:08,712 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:08,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:08,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:08,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:08,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-03 08:54:08,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:54:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:54:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:54:08,781 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-03 08:54:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:08,868 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:54:08,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:54:08,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-03 08:54:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:08,872 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:54:08,873 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:54:08,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:54:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:54:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:54:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:54:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:54:08,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:54:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:08,878 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:54:08,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:54:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:54:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:54:08,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:08,879 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-03 08:54:08,879 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:08,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-03 08:54:08,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:08,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:08,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:08,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:09,090 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 [2018-10-03 08:54:09,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:09,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:09,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-03 08:54:09,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:54:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:54:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:54:09,216 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-03 08:54:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:09,513 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:54:09,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:54:09,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-03 08:54:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:09,515 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:54:09,515 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:54:09,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:54:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:54:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:54:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:54:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:54:09,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:54:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:09,519 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:54:09,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:54:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:54:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:09,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:09,520 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-03 08:54:09,521 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:09,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:09,521 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-03 08:54:09,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:09,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:09,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:09,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:09,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:09,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:09,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:09,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:09,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:09,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-03 08:54:09,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:54:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:54:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:54:09,891 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-03 08:54:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:10,016 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:54:10,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:54:10,019 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-03 08:54:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:10,020 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:54:10,020 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:54:10,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:54:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:54:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:54:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:54:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:54:10,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:54:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:10,025 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:54:10,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:54:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:54:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:54:10,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:10,026 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-03 08:54:10,026 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:10,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-03 08:54:10,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:10,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:10,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:10,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:10,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:10,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:10,324 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 [2018-10-03 08:54:10,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:10,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:54:10,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:10,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:10,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:10,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-03 08:54:10,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:54:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:54:10,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:54:10,620 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-03 08:54:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:10,938 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:54:10,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:54:10,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-03 08:54:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:10,939 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:54:10,940 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:54:10,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:54:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:54:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:54:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:54:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:54:10,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:54:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:10,944 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:54:10,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:54:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:54:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:54:10,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:10,945 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-03 08:54:10,945 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:10,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-03 08:54:10,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:10,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:10,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:10,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:10,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:11,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:11,306 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:11,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:11,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:11,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:11,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-03 08:54:11,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:54:11,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:54:11,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:54:11,376 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-03 08:54:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:11,431 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:54:11,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:54:11,432 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-03 08:54:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:11,433 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:54:11,433 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:54:11,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:54:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:54:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:54:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:54:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:54:11,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:54:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:11,438 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:54:11,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:54:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:54:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:54:11,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:11,439 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-03 08:54:11,440 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:11,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-03 08:54:11,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:11,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:11,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:11,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:11,814 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 [2018-10-03 08:54:11,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:11,915 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:54:11,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:11,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:12,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-03 08:54:12,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:54:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:54:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:54:12,048 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-03 08:54:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:12,095 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:54:12,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:54:12,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-03 08:54:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:12,097 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:54:12,097 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:54:12,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:54:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:54:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:54:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:54:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:54:12,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:54:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:12,102 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:54:12,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:54:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:54:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:54:12,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:12,103 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-03 08:54:12,103 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:12,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-03 08:54:12,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:12,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:12,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:12,737 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 [2018-10-03 08:54:12,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:12,765 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:54:12,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:12,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:12,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-03 08:54:12,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:54:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:54:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:54:12,808 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-03 08:54:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:12,857 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:54:12,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:54:12,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-03 08:54:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:12,859 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:54:12,859 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:54:12,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:54:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:54:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:54:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:54:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:54:12,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:54:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:12,865 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:54:12,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:54:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:54:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:54:12,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:12,866 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-03 08:54:12,866 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:12,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-03 08:54:12,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:12,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:12,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:12,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:13,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:13,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:13,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-03 08:54:13,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:54:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:54:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:54:13,256 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-03 08:54:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:13,303 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:54:13,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:54:13,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-03 08:54:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:13,304 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:54:13,304 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:54:13,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:54:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:54:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:54:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:54:13,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:54:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:13,311 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:54:13,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:54:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:54:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:54:13,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:13,312 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-03 08:54:13,312 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:13,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-03 08:54:13,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:13,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:13,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:13,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:13,648 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 [2018-10-03 08:54:13,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:13,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:13,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:13,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:13,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-03 08:54:13,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:54:13,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:54:13,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:54:13,742 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-03 08:54:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:13,987 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:54:13,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:54:13,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-03 08:54:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:13,990 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:54:13,991 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:54:13,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:54:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:54:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:54:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:54:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:54:13,994 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:54:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:13,994 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:54:13,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:54:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:54:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:54:13,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:13,995 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-03 08:54:13,995 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:13,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-03 08:54:13,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:13,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:13,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:13,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:14,355 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 [2018-10-03 08:54:14,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:14,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:54:14,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:14,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:14,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-03 08:54:14,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:54:14,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:54:14,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:54:14,514 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-03 08:54:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:14,599 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:54:14,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:54:14,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-03 08:54:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:14,602 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:54:14,602 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:54:14,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:54:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:54:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:54:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:54:14,606 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:54:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:14,607 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:54:14,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:54:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:54:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:54:14,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:14,608 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-03 08:54:14,608 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:14,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:14,608 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-03 08:54:14,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:14,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:14,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:14,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:15,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:15,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:15,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:15,610 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:15,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:15,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:15,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:15,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-03 08:54:15,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:54:15,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:54:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:54:15,676 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-03 08:54:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:15,757 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:54:15,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:54:15,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-03 08:54:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:15,759 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:54:15,759 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:54:15,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:54:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:54:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:54:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:54:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:54:15,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:54:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:15,765 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:54:15,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:54:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:54:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:54:15,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:15,766 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-03 08:54:15,766 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:15,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-03 08:54:15,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:15,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:15,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:15,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:15,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:16,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:16,340 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:16,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:54:16,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:16,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:16,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-03 08:54:16,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:54:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:54:16,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:54:16,421 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-03 08:54:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:16,496 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:54:16,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:54:16,496 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-03 08:54:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:16,497 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:54:16,497 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:54:16,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:54:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:54:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:54:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:54:16,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:54:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:16,503 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:54:16,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:54:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:54:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:54:16,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:16,504 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-03 08:54:16,504 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:16,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-03 08:54:16,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:16,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:17,522 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 [2018-10-03 08:54:17,530 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:17,548 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:54:17,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:17,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:17,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-03 08:54:17,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:54:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:54:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:54:17,603 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-03 08:54:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:17,668 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:54:17,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:54:17,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-03 08:54:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:17,670 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:54:17,670 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:54:17,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:54:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:54:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:54:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:54:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:54:17,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:54:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:17,675 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:54:17,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:54:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:54:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:54:17,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:17,676 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-03 08:54:17,676 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:17,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:17,677 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-03 08:54:17,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:17,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:17,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:17,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:18,564 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 [2018-10-03 08:54:18,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:18,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-03 08:54:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:54:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:54:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:54:18,681 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-03 08:54:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:18,849 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:54:18,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:54:18,849 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-03 08:54:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:18,850 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:54:18,850 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:54:18,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:54:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:54:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:54:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:54:18,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:54:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:18,855 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:54:18,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:54:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:54:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:54:18,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:18,856 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-03 08:54:18,856 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:18,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:18,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-03 08:54:18,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:18,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:18,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:18,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:19,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:19,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:19,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:19,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:19,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:19,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-03 08:54:19,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:54:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:54:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:54:19,861 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-03 08:54:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:19,929 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:54:19,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:54:19,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-03 08:54:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:19,930 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:54:19,930 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:54:19,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:54:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:54:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:54:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:54:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:54:19,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:54:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:19,936 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:54:19,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:54:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:54:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:54:19,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:19,937 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-03 08:54:19,937 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:19,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:19,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-03 08:54:19,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:19,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:19,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:19,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:19,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:20,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:20,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:20,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:54:20,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:20,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:20,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-03 08:54:20,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:54:20,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:54:20,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:54:20,775 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-03 08:54:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:20,885 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:54:20,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:54:20,886 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-03 08:54:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:20,887 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:54:20,887 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:54:20,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:54:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:54:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:54:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:54:20,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:54:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:20,893 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:54:20,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:54:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:54:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:54:20,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:20,898 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-03 08:54:20,899 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:20,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-03 08:54:20,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:20,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:20,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:20,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:21,368 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 [2018-10-03 08:54:21,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:21,400 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:21,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:21,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:21,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-03 08:54:21,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:54:21,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:54:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:54:21,453 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-03 08:54:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:21,694 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:54:21,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:54:21,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-03 08:54:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:21,695 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:54:21,695 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:54:21,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:54:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:54:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:54:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:54:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:54:21,699 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:54:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:21,699 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:54:21,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:54:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:54:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:54:21,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:21,700 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-03 08:54:21,700 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:21,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-03 08:54:21,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:21,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:21,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:21,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:21,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:22,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:22,329 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 [2018-10-03 08:54:22,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:22,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:54:22,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:22,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:22,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:22,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-03 08:54:22,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:54:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:54:22,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:54:22,414 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-03 08:54:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:22,570 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:54:22,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:54:22,570 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-03 08:54:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:22,571 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:54:22,571 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:54:22,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:54:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:54:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:54:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:54:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:54:22,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:54:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:22,576 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:54:22,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:54:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:54:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:54:22,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:22,577 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-03 08:54:22,577 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:22,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-03 08:54:22,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:22,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:22,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:22,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:23,284 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 [2018-10-03 08:54:23,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:23,318 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:54:23,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:23,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:23,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-03 08:54:23,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:54:23,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:54:23,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:54:23,369 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-03 08:54:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:23,538 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:54:23,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:54:23,538 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-03 08:54:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:23,539 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:23,539 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:23,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:54:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:54:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:54:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:54:23,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:54:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:23,544 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:54:23,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:54:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:54:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:54:23,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:23,544 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-03 08:54:23,545 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:23,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-03 08:54:23,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:23,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:23,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:23,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:24,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:24,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:24,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-03 08:54:24,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:54:24,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:54:24,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:54:24,194 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-03 08:54:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:24,257 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:54:24,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:54:24,258 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-03 08:54:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:24,258 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:54:24,258 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:54:24,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:54:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:54:24,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:54:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:54:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:54:24,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:54:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:24,263 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:54:24,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:54:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:54:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:54:24,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:24,264 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-03 08:54:24,264 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:24,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-03 08:54:24,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:24,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:24,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:24,875 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 [2018-10-03 08:54:24,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:24,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:24,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:24,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:24,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-03 08:54:24,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:54:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:54:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:54:24,939 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-03 08:54:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:25,002 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:54:25,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:54:25,003 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-03 08:54:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:25,003 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:25,003 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:25,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:54:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:54:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:54:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:54:25,008 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:54:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,008 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:54:25,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:54:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:54:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:54:25,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,009 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-03 08:54:25,009 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-03 08:54:25,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:25,877 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 [2018-10-03 08:54:25,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:25,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:54:25,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-03 08:54:25,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:54:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:54:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:54:25,948 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-03 08:54:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:25,988 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:54:25,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:54:25,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-03 08:54:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:25,989 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:54:25,989 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:54:25,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:54:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:54:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:54:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:54:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:54:25,993 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:54:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,993 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:54:25,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:54:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:54:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:54:25,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,993 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-03 08:54:25,994 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-03 08:54:25,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:26,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:26,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:26,996 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:26,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:26,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-03 08:54:27,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:54:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:54:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:54:27,047 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-03 08:54:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:27,580 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:54:27,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:54:27,581 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-03 08:54:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:27,581 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:27,582 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:27,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:54:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:54:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:54:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:54:27,586 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:54:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:27,587 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:54:27,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:54:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:54:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:54:27,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:27,588 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-03 08:54:27,588 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:27,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-03 08:54:27,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:27,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:27,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:27,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,673 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 [2018-10-03 08:54:28,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:28,706 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:54:28,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:28,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-03 08:54:28,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:54:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:54:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:54:28,750 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-03 08:54:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:28,825 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:54:28,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:54:28,826 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-03 08:54:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:28,826 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:54:28,827 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:54:28,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:54:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:54:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:54:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:54:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:54:28,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:54:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:28,831 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:54:28,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:54:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:54:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:54:28,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:28,832 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-03 08:54:28,832 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:28,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:28,832 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-03 08:54:28,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:28,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:29,492 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 [2018-10-03 08:54:29,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:29,532 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:54:29,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:29,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:29,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-03 08:54:29,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:54:29,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:54:29,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:54:29,584 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-03 08:54:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:29,632 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:54:29,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:54:29,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-03 08:54:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:29,633 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:29,633 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:29,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:54:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:54:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:54:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:54:29,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:54:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:29,637 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:54:29,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:54:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:54:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:54:29,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:29,638 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-03 08:54:29,638 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:29,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-03 08:54:29,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:29,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:29,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:29,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:30,365 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 [2018-10-03 08:54:30,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:30,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:30,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-03 08:54:30,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:54:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:54:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:54:30,461 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-03 08:54:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:30,558 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 08:54:30,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:54:30,558 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-03 08:54:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:30,558 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:54:30,559 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:54:30,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:54:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:54:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:54:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:54:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 08:54:30,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 08:54:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:30,561 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 08:54:30,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:54:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 08:54:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:54:30,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:30,561 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-03 08:54:30,562 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:30,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-03 08:54:30,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:30,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:30,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:30,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:31,383 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 [2018-10-03 08:54:31,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:31,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:31,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:31,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:31,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-03 08:54:31,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:54:31,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:54:31,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:54:31,512 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-03 08:54:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,668 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:54:31,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:54:31,668 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-03 08:54:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,669 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:31,669 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:31,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:54:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:54:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:54:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:54:31,673 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 08:54:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,673 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:54:31,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:54:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:54:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:54:31,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,674 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-03 08:54:31,674 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-03 08:54:31,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:31,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:32,517 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 [2018-10-03 08:54:32,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:32,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:54:32,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:32,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:32,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-03 08:54:32,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:54:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:54:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:54:32,636 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-03 08:54:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:32,699 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 08:54:32,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:54:32,700 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-03 08:54:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:32,701 INFO L225 Difference]: With dead ends: 46 [2018-10-03 08:54:32,701 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:54:32,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:54:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:54:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:54:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:54:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 08:54:32,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 08:54:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:32,706 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 08:54:32,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:54:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 08:54:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:54:32,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:32,706 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-03 08:54:32,706 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:32,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-10-03 08:54:32,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:32,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:32,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:32,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:32,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:33,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:33,502 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 [2018-10-03 08:54:33,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:33,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:33,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:33,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:33,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:33,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-03 08:54:33,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:54:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:54:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:54:33,582 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-03 08:54:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:33,687 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:54:33,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:54:33,687 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-03 08:54:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:33,688 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:33,688 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:33,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:54:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:54:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:54:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:54:33,692 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 08:54:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:33,693 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:54:33,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:54:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:54:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:54:33,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:33,693 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-03 08:54:33,693 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:33,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-10-03 08:54:33,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:33,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:33,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:33,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:34,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:34,731 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:34,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:54:34,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:34,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:34,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-03 08:54:34,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:54:34,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:54:34,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:54:34,809 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-03 08:54:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:34,883 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 08:54:34,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:54:34,884 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-03 08:54:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:34,885 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:54:34,885 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:54:34,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:54:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:54:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:54:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:54:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 08:54:34,888 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 08:54:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:34,888 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 08:54:34,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:54:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 08:54:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:54:34,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:34,889 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-03 08:54:34,889 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:34,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-10-03 08:54:34,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:34,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:34,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:34,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:36,102 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 [2018-10-03 08:54:36,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:36,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:54:36,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:36,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:36,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-03 08:54:36,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:54:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:54:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:54:36,180 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-03 08:54:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:36,251 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:54:36,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:54:36,252 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-03 08:54:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:36,253 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:36,253 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:36,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:54:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:54:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:54:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:54:36,256 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 08:54:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:36,256 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:54:36,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:54:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:54:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:54:36,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:36,257 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-03 08:54:36,257 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:36,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-10-03 08:54:36,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:36,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:36,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:36,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:37,163 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 [2018-10-03 08:54:37,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:37,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:37,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-03 08:54:37,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:54:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:54:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:54:37,236 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-03 08:54:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:37,379 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 08:54:37,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:54:37,379 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-03 08:54:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:37,380 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:54:37,381 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:54:37,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:54:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:54:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:54:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:54:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 08:54:37,385 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 08:54:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:37,385 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 08:54:37,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:54:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 08:54:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:54:37,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:37,386 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-03 08:54:37,387 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:37,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-10-03 08:54:37,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:37,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:37,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:37,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:38,565 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 [2018-10-03 08:54:38,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:38,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:38,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:38,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:38,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-03 08:54:38,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:54:38,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:54:38,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:54:38,647 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-03 08:54:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:38,730 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:54:38,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:54:38,731 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-03 08:54:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:38,731 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:38,732 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:38,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:54:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:54:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:54:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:54:38,735 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 08:54:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:38,735 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:54:38,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:54:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:54:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:54:38,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:38,736 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-03 08:54:38,736 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:38,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-10-03 08:54:38,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:38,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:38,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:38,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:39,783 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 [2018-10-03 08:54:39,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:39,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:54:39,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:39,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:39,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-03 08:54:39,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:54:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:54:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:54:39,892 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-03 08:54:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:40,302 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 08:54:40,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:54:40,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-03 08:54:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:40,303 INFO L225 Difference]: With dead ends: 52 [2018-10-03 08:54:40,303 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:54:40,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:54:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:54:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:54:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:54:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 08:54:40,306 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 08:54:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:40,307 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 08:54:40,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:54:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 08:54:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:54:40,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:40,308 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-03 08:54:40,308 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:40,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-10-03 08:54:40,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:40,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:40,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:40,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:40,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:41,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:41,895 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:41,925 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:41,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:41,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:41,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-10-03 08:54:41,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:54:41,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:54:41,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:54:41,981 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-03 08:54:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:42,235 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:54:42,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:54:42,235 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-03 08:54:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:42,236 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:54:42,236 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:54:42,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:54:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:54:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:54:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:54:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:54:42,240 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 08:54:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:42,240 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:54:42,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:54:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:54:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:54:42,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:42,241 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-03 08:54:42,241 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:42,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-10-03 08:54:42,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:42,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:42,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:42,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:43,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:43,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:43,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:54:43,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:43,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:43,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-03 08:54:43,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:54:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:54:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:54:43,564 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-03 08:54:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:43,647 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 08:54:43,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:54:43,652 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-03 08:54:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:43,652 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:54:43,652 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:54:43,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:54:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:54:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:54:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:54:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 08:54:43,655 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 08:54:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:43,656 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 08:54:43,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:54:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 08:54:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:54:43,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:43,656 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-03 08:54:43,657 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:43,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-10-03 08:54:43,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:43,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:43,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:43,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:44,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:44,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:44,785 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:44,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:54:44,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:44,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:44,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:44,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-10-03 08:54:44,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:54:44,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:54:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:54:44,864 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-03 08:54:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:44,951 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:54:44,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:54:44,951 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-03 08:54:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:44,952 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:44,952 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:44,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:54:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:54:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:54:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:54:44,956 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 08:54:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:44,957 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:54:44,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:54:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:54:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:54:44,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:44,957 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-03 08:54:44,957 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:44,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-10-03 08:54:44,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:44,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:44,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:44,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:47,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:47,084 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 [2018-10-03 08:54:47,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:47,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:47,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:47,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-10-03 08:54:47,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:54:47,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:54:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:54:47,164 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-03 08:54:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:47,262 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 08:54:47,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:54:47,263 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-03 08:54:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:47,264 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:54:47,264 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:54:47,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:54:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:54:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:54:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:54:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 08:54:47,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 08:54:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:47,267 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 08:54:47,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:54:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 08:54:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:54:47,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:47,268 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-03 08:54:47,268 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:47,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-10-03 08:54:47,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:47,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:47,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:47,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:48,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:48,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:48,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:48,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:48,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:48,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-10-03 08:54:48,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:54:48,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:54:48,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:54:48,628 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-03 08:54:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:48,739 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:54:48,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:54:48,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-03 08:54:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:48,740 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:54:48,741 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:54:48,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:54:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:54:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:54:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:54:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:54:48,743 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 08:54:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:48,744 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:54:48,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:54:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:54:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:54:48,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:48,745 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-03 08:54:48,745 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:48,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-10-03 08:54:48,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:48,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:48,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:48,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:48,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:50,136 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 [2018-10-03 08:54:50,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:50,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:54:50,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:50,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:50,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-10-03 08:54:50,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:54:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:54:50,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:54:50,229 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-03 08:54:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:50,339 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 08:54:50,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:54:50,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-03 08:54:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:50,340 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:54:50,340 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:54:50,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:54:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:54:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:54:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:54:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 08:54:50,344 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 08:54:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:50,345 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 08:54:50,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:54:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 08:54:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:54:50,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:50,346 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-03 08:54:50,346 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:50,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-10-03 08:54:50,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:50,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:50,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:50,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:50,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:52,057 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 [2018-10-03 08:54:52,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:52,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:52,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:52,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:52,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-10-03 08:54:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:54:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:54:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:54:52,141 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-03 08:54:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:52,240 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:54:52,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:54:52,241 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-03 08:54:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:52,242 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:52,242 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:52,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:54:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:54:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:54:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:54:52,245 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 08:54:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:52,245 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:54:52,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:54:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:54:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:54:52,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:52,246 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-03 08:54:52,246 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:52,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-10-03 08:54:52,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:52,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:52,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:52,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:53,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:53,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:53,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:53,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:54:53,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:53,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:53,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:53,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-10-03 08:54:53,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:54:53,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:54:53,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:54:53,619 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-03 08:54:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:53,764 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 08:54:53,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:54:53,764 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-03 08:54:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:53,765 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:54:53,765 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:54:53,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:54:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:54:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:54:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:54:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 08:54:53,769 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 08:54:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:53,769 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 08:54:53,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:54:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 08:54:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:54:53,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:53,769 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-03 08:54:53,770 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:53,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:53,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-10-03 08:54:53,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:53,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:53,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:53,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:53,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:55,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:55,114 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 [2018-10-03 08:54:55,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:55,164 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 08:54:55,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:55,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:55,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:55,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-10-03 08:54:55,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:54:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:54:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:54:55,205 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-03 08:54:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:55,307 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:54:55,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:54:55,307 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-03 08:54:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:55,308 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:54:55,308 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:54:55,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:54:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:54:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:54:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:54:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:54:55,312 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 08:54:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:55,312 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:54:55,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:54:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:54:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:54:55,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:55,313 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-03 08:54:55,313 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:55,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-10-03 08:54:55,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:55,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:55,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:55,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:56,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:56,918 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 [2018-10-03 08:54:56,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:56,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:57,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:57,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-10-03 08:54:57,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:54:57,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:54:57,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:54:57,114 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-03 08:54:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:57,340 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 08:54:57,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:54:57,341 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-03 08:54:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:57,341 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:54:57,341 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 08:54:57,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:54:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 08:54:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 08:54:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:54:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 08:54:57,346 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 08:54:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:57,346 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 08:54:57,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:54:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 08:54:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 08:54:57,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:57,347 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-03 08:54:57,347 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:57,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:57,348 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-10-03 08:54:57,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:57,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:57,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:57,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:57,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:58,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:58,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:58,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:58,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:58,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:58,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-10-03 08:54:58,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:54:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:54:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:54:58,950 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-03 08:54:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:59,049 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:54:59,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:54:59,052 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-03 08:54:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:59,052 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:54:59,053 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:54:59,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:54:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:54:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:54:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:54:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:54:59,056 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 08:54:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:59,056 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:54:59,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:54:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:54:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:54:59,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:59,057 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-03 08:54:59,057 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:59,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-10-03 08:54:59,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:59,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:59,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:59,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:00,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:00,594 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 [2018-10-03 08:55:00,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:00,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:55:00,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:00,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:00,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:00,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-10-03 08:55:00,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:55:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:55:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:55:00,704 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-03 08:55:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:00,842 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 08:55:00,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:55:00,843 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-03 08:55:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:00,844 INFO L225 Difference]: With dead ends: 64 [2018-10-03 08:55:00,844 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:55:00,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:55:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:55:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 08:55:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:55:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 08:55:00,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 08:55:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:00,849 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 08:55:00,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:55:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 08:55:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 08:55:00,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:00,849 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-03 08:55:00,850 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:00,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-10-03 08:55:00,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:00,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:00,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:00,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:00,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:02,993 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 [2018-10-03 08:55:03,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:03,039 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:03,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:03,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:03,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:03,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-10-03 08:55:03,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:55:03,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:55:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:55:03,101 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-03 08:55:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:03,229 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:55:03,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:55:03,230 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-03 08:55:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:03,231 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:55:03,231 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:55:03,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:55:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:55:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:55:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:55:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:55:03,236 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 08:55:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:03,236 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:55:03,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:55:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:55:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:55:03,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:03,237 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-03 08:55:03,237 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:03,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-10-03 08:55:03,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:03,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:03,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:03,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:03,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:05,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:05,141 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 [2018-10-03 08:55:05,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:05,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:55:05,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:05,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:05,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:05,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-10-03 08:55:05,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:55:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:55:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:55:05,322 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-03 08:55:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:05,516 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 08:55:05,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:55:05,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-03 08:55:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:05,518 INFO L225 Difference]: With dead ends: 66 [2018-10-03 08:55:05,518 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:55:05,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:55:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:55:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 08:55:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:55:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 08:55:05,522 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 08:55:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:05,522 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 08:55:05,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:55:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 08:55:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:55:05,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:05,523 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-03 08:55:05,523 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:05,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-10-03 08:55:05,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:05,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:05,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:05,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:05,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:08,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:08,165 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:08,216 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:55:08,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:08,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:08,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-10-03 08:55:08,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:55:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:55:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:55:08,275 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-03 08:55:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:08,431 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:55:08,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:55:08,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-03 08:55:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:08,432 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:55:08,432 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:55:08,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:55:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:55:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:55:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:55:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:55:08,436 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 08:55:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:08,436 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:55:08,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:55:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:55:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:55:08,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:08,437 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-03 08:55:08,437 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:08,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-10-03 08:55:08,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:08,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:08,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:08,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:10,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:10,283 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 [2018-10-03 08:55:10,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:10,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:10,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:10,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-10-03 08:55:10,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:55:10,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:55:10,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:55:10,368 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-03 08:55:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:10,480 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 08:55:10,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:55:10,480 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-03 08:55:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:10,481 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:55:10,481 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:55:10,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:55:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:55:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:55:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:55:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 08:55:10,485 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 08:55:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:10,485 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 08:55:10,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:55:10,485 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 08:55:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:55:10,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:10,486 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-03 08:55:10,486 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:10,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:10,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-10-03 08:55:10,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:10,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:10,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:10,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:10,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:12,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:12,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:12,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:12,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:12,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:12,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:12,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:12,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-10-03 08:55:12,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:55:12,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:55:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:55:12,661 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-03 08:55:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:12,873 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:55:12,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:55:12,873 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-03 08:55:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:12,874 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:55:12,874 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:55:12,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:55:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:55:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:55:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:55:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:55:12,878 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 08:55:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:12,879 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:55:12,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:55:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:55:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:55:12,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:12,879 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-03 08:55:12,880 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:12,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-10-03 08:55:12,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:12,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:12,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:12,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:12,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:14,630 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 [2018-10-03 08:55:14,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:14,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:55:14,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:14,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:14,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-10-03 08:55:14,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:55:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:55:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:55:14,854 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-03 08:55:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:14,996 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 08:55:15,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:55:15,002 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-03 08:55:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:15,002 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:55:15,002 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:55:15,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:55:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:55:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 08:55:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:55:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 08:55:15,006 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 08:55:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:15,007 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 08:55:15,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:55:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 08:55:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:55:15,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:15,008 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-03 08:55:15,008 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:15,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-10-03 08:55:15,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:15,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:15,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:15,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:15,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:17,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:17,179 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 [2018-10-03 08:55:17,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:17,229 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:17,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:17,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:17,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:17,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-10-03 08:55:17,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:55:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:55:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:55:17,289 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-03 08:55:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:17,453 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:55:17,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:55:17,453 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-03 08:55:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:17,454 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:55:17,454 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:55:17,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:55:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:55:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:55:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:55:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:55:17,458 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 08:55:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:17,458 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:55:17,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:55:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:55:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:55:17,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:17,459 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-03 08:55:17,459 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:17,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:17,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-03 08:55:17,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:17,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:17,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:17,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:17,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:19,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:19,291 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 [2018-10-03 08:55:19,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:19,353 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:55:19,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:19,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:19,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:19,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-10-03 08:55:19,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:55:19,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:55:19,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:55:19,411 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-03 08:55:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:19,615 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 08:55:19,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:55:19,616 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-03 08:55:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:19,616 INFO L225 Difference]: With dead ends: 72 [2018-10-03 08:55:19,617 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 08:55:19,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:55:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 08:55:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 08:55:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:55:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 08:55:19,619 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 08:55:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:19,619 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 08:55:19,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:55:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 08:55:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 08:55:19,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:19,620 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-03 08:55:19,620 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:19,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-03 08:55:19,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:19,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:19,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:19,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:19,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:21,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:21,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:21,536 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 08:55:21,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:21,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:21,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-10-03 08:55:21,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:55:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:55:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:55:21,690 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-03 08:55:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:22,065 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:55:22,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:55:22,066 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-03 08:55:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:22,067 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:55:22,067 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:55:22,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:55:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:55:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:55:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:55:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:55:22,070 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-03 08:55:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:22,071 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:55:22,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:55:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:55:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:55:22,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:22,071 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-03 08:55:22,072 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:22,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-03 08:55:22,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:22,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:22,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:22,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:24,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:24,174 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 [2018-10-03 08:55:24,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:24,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:24,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:24,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-10-03 08:55:24,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:55:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:55:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:55:24,269 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-03 08:55:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:24,397 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-03 08:55:24,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:55:24,398 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-03 08:55:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:24,398 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:55:24,399 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 08:55:24,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:55:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 08:55:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 08:55:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:55:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-03 08:55:24,402 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-03 08:55:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:24,402 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-03 08:55:24,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:55:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-03 08:55:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 08:55:24,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:24,403 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-03 08:55:24,403 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:24,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:24,404 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-03 08:55:24,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:24,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:24,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:24,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:24,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:26,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:26,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:26,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:26,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:26,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:26,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-10-03 08:55:26,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:55:26,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:55:26,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:55:26,534 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-03 08:55:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:26,700 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:55:26,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:55:26,700 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-03 08:55:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:26,701 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:55:26,701 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:55:26,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:55:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:55:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:55:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:55:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:55:26,704 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-03 08:55:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:26,705 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:55:26,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:55:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:55:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:55:26,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:26,706 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-03 08:55:26,706 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:26,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-03 08:55:26,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:26,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:26,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:26,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:29,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:29,009 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 [2018-10-03 08:55:29,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:29,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:55:29,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:29,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:29,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:29,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-10-03 08:55:29,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:55:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:55:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:55:29,259 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-03 08:55:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:30,027 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-03 08:55:30,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:55:30,027 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-03 08:55:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:30,028 INFO L225 Difference]: With dead ends: 76 [2018-10-03 08:55:30,028 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:55:30,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:55:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:55:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 08:55:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:55:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-03 08:55:30,032 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-03 08:55:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:30,033 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-03 08:55:30,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:55:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-03 08:55:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:55:30,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:30,034 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-03 08:55:30,034 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:30,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-03 08:55:30,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:30,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:30,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:30,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:30,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:33,380 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 [2018-10-03 08:55:33,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:33,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:33,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:33,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:33,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-10-03 08:55:33,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:55:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:55:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:55:33,510 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-03 08:55:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:33,675 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:55:33,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:55:33,676 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-03 08:55:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:33,677 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:55:33,677 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:55:33,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:55:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:55:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:55:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:55:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:55:33,680 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-03 08:55:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:33,681 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:55:33,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:55:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:55:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:55:33,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:33,681 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-03 08:55:33,682 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:33,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-03 08:55:33,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:33,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:33,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:33,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:36,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:36,367 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 [2018-10-03 08:55:36,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:36,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:55:36,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:36,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:36,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:36,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-10-03 08:55:36,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:55:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:55:36,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:55:36,497 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-03 08:55:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:36,626 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-03 08:55:36,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:55:36,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-03 08:55:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:36,627 INFO L225 Difference]: With dead ends: 78 [2018-10-03 08:55:36,628 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:55:36,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:55:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:55:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:55:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:55:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-03 08:55:36,631 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-03 08:55:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:36,632 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-03 08:55:36,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:55:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-03 08:55:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 08:55:36,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:36,633 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-03 08:55:36,633 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:36,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-03 08:55:36,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:36,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:36,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:36,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:36,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:39,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:39,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:39,164 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:39,262 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:55:39,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:39,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:39,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:39,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-10-03 08:55:39,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:55:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:55:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:55:39,345 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-03 08:55:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:39,514 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:55:39,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:55:39,515 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-03 08:55:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:39,516 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:55:39,516 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:55:39,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:55:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:55:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:55:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:55:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:55:39,519 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-03 08:55:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:39,519 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:55:39,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:55:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:55:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:55:39,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:39,520 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-03 08:55:39,520 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:39,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-03 08:55:39,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:39,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:39,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:39,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:39,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:41,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:41,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:41,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:41,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:41,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:41,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-10-03 08:55:41,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:55:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:55:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:55:41,975 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-03 08:55:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:42,190 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-03 08:55:42,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:55:42,191 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-03 08:55:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:42,191 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:55:42,191 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:55:42,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:55:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:55:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 08:55:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:55:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-03 08:55:42,193 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-03 08:55:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:42,194 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-03 08:55:42,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:55:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-03 08:55:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:55:42,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:42,194 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-03 08:55:42,194 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:42,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-03 08:55:42,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:42,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:42,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:42,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:42,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:44,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:44,677 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 [2018-10-03 08:55:44,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:44,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:44,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:44,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:44,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:44,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-10-03 08:55:44,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:55:44,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:55:44,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:55:44,781 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-03 08:55:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:44,934 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:55:44,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:55:44,935 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-03 08:55:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:44,935 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:55:44,935 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:55:44,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:55:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:55:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:55:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:55:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:55:44,938 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-03 08:55:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:44,939 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:55:44,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:55:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:55:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:55:44,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:44,939 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-03 08:55:44,940 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:44,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-03 08:55:44,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:44,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:44,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:44,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:44,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:47,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:47,610 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 [2018-10-03 08:55:47,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:47,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:55:47,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:47,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:47,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:47,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-10-03 08:55:47,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:55:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:55:47,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:55:47,813 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-03 08:55:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:47,935 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-03 08:55:47,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:55:47,935 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-03 08:55:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:47,936 INFO L225 Difference]: With dead ends: 82 [2018-10-03 08:55:47,936 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:55:47,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:55:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:55:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 08:55:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:55:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-03 08:55:47,940 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-03 08:55:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:47,941 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-03 08:55:47,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:55:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-03 08:55:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:55:47,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:47,941 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-03 08:55:47,941 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:47,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-03 08:55:47,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:47,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:47,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:47,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:47,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:50,388 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 [2018-10-03 08:55:50,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:50,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:50,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:50,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:50,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-10-03 08:55:50,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:55:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:55:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:55:50,513 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-03 08:55:51,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:51,512 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:55:51,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:55:51,513 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-03 08:55:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:51,514 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:55:51,514 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:55:51,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:55:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:55:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:55:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:55:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:55:51,517 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-03 08:55:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:51,517 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:55:51,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:55:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:55:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:55:51,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:51,518 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-03 08:55:51,518 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:51,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-03 08:55:51,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:51,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:51,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:51,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:51,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:54,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:54,365 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 [2018-10-03 08:55:54,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:54,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:55:54,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:54,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:54,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:54,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-10-03 08:55:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:55:54,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:55:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:55:54,510 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-10-03 08:55:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:54,628 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-03 08:55:54,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:55:54,628 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-10-03 08:55:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:54,629 INFO L225 Difference]: With dead ends: 84 [2018-10-03 08:55:54,629 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 08:55:54,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:55:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 08:55:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 08:55:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:55:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-03 08:55:54,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-03 08:55:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:54,634 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-03 08:55:54,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:55:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-03 08:55:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-03 08:55:54,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:54,634 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-03 08:55:54,635 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:54,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-03 08:55:54,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:54,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:54,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:54,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:54,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:57,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:57,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:57,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:57,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-03 08:55:57,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:57,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:57,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:57,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-10-03 08:55:57,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:55:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:55:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:55:57,634 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-03 08:55:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:57,833 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:55:57,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:55:57,834 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-03 08:55:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:57,835 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:55:57,835 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:55:57,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:55:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:55:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:55:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:55:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:55:57,839 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-03 08:55:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:57,839 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:55:57,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:55:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:55:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:55:57,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:57,840 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-03 08:55:57,840 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:57,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-03 08:55:57,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:57,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:57,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:57,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:57,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:00,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:00,491 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 [2018-10-03 08:56:00,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:00,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:00,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:00,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-10-03 08:56:00,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:56:00,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:56:00,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:56:00,645 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-10-03 08:56:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:00,778 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-03 08:56:00,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:56:00,779 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-10-03 08:56:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:00,780 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:56:00,780 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:56:00,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:56:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:56:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-03 08:56:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:56:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-03 08:56:00,784 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-03 08:56:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:00,784 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-03 08:56:00,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:56:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-03 08:56:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:56:00,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:00,784 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-03 08:56:00,785 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:00,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-03 08:56:00,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:00,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:00,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:00,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:00,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:04,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:04,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:04,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:04,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:04,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:04,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-10-03 08:56:04,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:56:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:56:04,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:56:04,395 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-03 08:56:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:04,651 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:56:04,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:56:04,651 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-03 08:56:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:04,652 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:56:04,652 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:56:04,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:56:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:56:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:56:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:56:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:56:04,655 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-03 08:56:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:04,655 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:56:04,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:56:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:56:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:56:04,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:04,656 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-03 08:56:04,656 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:04,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-03 08:56:04,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:04,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:04,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:04,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:04,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:07,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:07,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:07,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:07,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 08:56:07,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:07,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:07,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:07,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-10-03 08:56:07,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:56:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:56:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:56:07,540 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-10-03 08:56:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:07,774 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-03 08:56:07,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:56:07,775 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-10-03 08:56:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:07,775 INFO L225 Difference]: With dead ends: 88 [2018-10-03 08:56:07,775 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:56:07,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:56:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:56:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 08:56:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:56:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-03 08:56:07,778 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-03 08:56:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:07,778 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-03 08:56:07,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:56:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-03 08:56:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-03 08:56:07,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:07,778 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-03 08:56:07,778 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:07,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-03 08:56:07,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:07,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:07,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:07,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:07,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:10,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:10,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:10,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:10,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:10,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:10,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:10,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:10,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-10-03 08:56:10,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:56:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:56:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:56:10,926 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-03 08:56:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:11,874 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:56:11,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:56:11,875 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-03 08:56:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:11,875 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:56:11,875 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:56:11,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:56:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:56:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:56:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:56:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:56:11,878 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-03 08:56:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:11,879 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:56:11,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:56:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:56:11,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:56:11,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:11,879 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-03 08:56:11,880 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:11,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-03 08:56:11,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:11,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:11,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:11,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:11,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:15,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:15,067 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 [2018-10-03 08:56:15,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:15,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:56:15,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:15,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:15,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:15,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-10-03 08:56:15,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:56:15,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:56:15,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:56:15,207 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-10-03 08:56:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:15,484 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-03 08:56:15,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:56:15,484 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-10-03 08:56:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:15,485 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:56:15,485 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 08:56:15,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:56:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 08:56:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-03 08:56:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 08:56:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-03 08:56:15,488 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-03 08:56:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:15,488 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-03 08:56:15,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:56:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-03 08:56:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 08:56:15,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:15,489 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-03 08:56:15,489 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:15,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:15,490 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-03 08:56:15,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:15,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:15,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:15,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:15,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:18,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:18,753 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 [2018-10-03 08:56:18,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:18,835 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:56:18,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:18,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:18,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:18,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-10-03 08:56:18,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:56:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:56:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:56:18,883 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-03 08:56:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:19,108 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:56:19,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:56:19,109 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-03 08:56:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:19,110 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:56:19,110 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:56:19,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:56:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:56:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:56:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:56:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:56:19,113 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-03 08:56:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:19,113 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:56:19,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:56:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:56:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:56:19,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:19,114 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-03 08:56:19,114 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:19,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-03 08:56:19,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:19,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:19,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:19,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:19,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:22,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:22,138 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 [2018-10-03 08:56:22,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:22,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:22,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:22,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-10-03 08:56:22,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:56:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:56:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:56:22,256 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-10-03 08:56:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:22,405 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-03 08:56:22,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:56:22,406 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-10-03 08:56:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:22,407 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:56:22,407 INFO L226 Difference]: Without dead ends: 90 [2018-10-03 08:56:22,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:56:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-03 08:56:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-03 08:56:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:56:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-03 08:56:22,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-03 08:56:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:22,411 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-03 08:56:22,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:56:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-03 08:56:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 08:56:22,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:22,412 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-03 08:56:22,412 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:22,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-03 08:56:22,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:22,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:22,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:22,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:22,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:25,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:25,779 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 [2018-10-03 08:56:25,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:25,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:25,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:25,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:25,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:25,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-10-03 08:56:25,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:56:25,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:56:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:56:25,891 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-03 08:56:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:26,108 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:56:26,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:56:26,109 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-03 08:56:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:26,109 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:56:26,109 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:56:26,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:56:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:56:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:56:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:56:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:56:26,113 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-03 08:56:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:26,113 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:56:26,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:56:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:56:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:56:26,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:26,114 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-03 08:56:26,114 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:26,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-03 08:56:26,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:26,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:26,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:26,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:26,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:29,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:29,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:29,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:29,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 08:56:29,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:29,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:29,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:29,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-10-03 08:56:29,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:56:29,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:56:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:56:29,744 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-10-03 08:56:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:29,884 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-03 08:56:29,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:56:29,884 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-10-03 08:56:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:29,885 INFO L225 Difference]: With dead ends: 94 [2018-10-03 08:56:29,885 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 08:56:29,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:56:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 08:56:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-03 08:56:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 08:56:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-03 08:56:29,889 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-03 08:56:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:29,889 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-03 08:56:29,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:56:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-03 08:56:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-03 08:56:29,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:29,890 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-03 08:56:29,890 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:29,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-03 08:56:29,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:29,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:29,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:33,206 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 [2018-10-03 08:56:33,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:33,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:33,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:33,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:33,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-10-03 08:56:33,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:56:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:56:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:56:33,330 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-03 08:56:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:33,621 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:56:33,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:56:33,622 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-03 08:56:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:33,622 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:56:33,622 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:56:33,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:56:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:56:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:56:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:56:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:56:33,626 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-03 08:56:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:33,627 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:56:33,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:56:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:56:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:56:33,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:33,627 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-03 08:56:33,628 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:33,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-03 08:56:33,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:33,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:33,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:33,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:36,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:36,950 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 [2018-10-03 08:56:36,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:37,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 08:56:37,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:37,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:37,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:37,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-10-03 08:56:37,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:56:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:56:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:56:37,230 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-10-03 08:56:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:37,452 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-03 08:56:37,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:56:37,453 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-10-03 08:56:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:37,454 INFO L225 Difference]: With dead ends: 96 [2018-10-03 08:56:37,454 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:56:37,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:56:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:56:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-03 08:56:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:56:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-03 08:56:37,457 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-03 08:56:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:37,457 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-03 08:56:37,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:56:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-03 08:56:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:56:37,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:37,458 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-03 08:56:37,458 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:37,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-03 08:56:37,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:37,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:37,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:37,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:37,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:41,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:41,222 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 [2018-10-03 08:56:41,230 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:41,311 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-03 08:56:41,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:41,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:41,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:41,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-10-03 08:56:41,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:56:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:56:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:56:41,366 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-03 08:56:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:41,543 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:56:41,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:56:41,544 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-03 08:56:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:41,545 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:56:41,545 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:56:41,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:56:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:56:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:56:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:56:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:56:41,548 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-03 08:56:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:41,548 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:56:41,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:56:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:56:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:56:41,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:41,549 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-03 08:56:41,549 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:41,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-03 08:56:41,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:41,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:41,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:41,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:41,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:45,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:45,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:45,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:45,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:45,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:45,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-10-03 08:56:45,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:56:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:56:45,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:56:45,385 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-10-03 08:56:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:45,529 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-03 08:56:45,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:56:45,530 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-10-03 08:56:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:45,530 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:56:45,531 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:56:45,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:56:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:56:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-03 08:56:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:56:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-03 08:56:45,534 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-03 08:56:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:45,534 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-03 08:56:45,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:56:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-03 08:56:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-03 08:56:45,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:45,535 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-03 08:56:45,535 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:45,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-03 08:56:45,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:45,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:45,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:45,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:45,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:49,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:49,272 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 [2018-10-03 08:56:49,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:49,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:49,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:49,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:49,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:49,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-10-03 08:56:49,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:56:49,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:56:49,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:56:49,407 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-03 08:56:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:49,567 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:56:49,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:56:49,568 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-03 08:56:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:49,569 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:56:49,569 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:56:49,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:56:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:56:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:56:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:56:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:56:49,573 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-03 08:56:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:49,573 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:56:49,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:56:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:56:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:56:49,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:49,574 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-03 08:56:49,574 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:49,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-03 08:56:49,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:49,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:49,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:49,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:49,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:53,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:53,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:53,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:53,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-03 08:56:53,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:53,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:53,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:53,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-10-03 08:56:53,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:56:53,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:56:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:56:53,411 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-10-03 08:56:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:53,609 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-03 08:56:53,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:56:53,610 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-10-03 08:56:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:53,611 INFO L225 Difference]: With dead ends: 100 [2018-10-03 08:56:53,611 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:56:53,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:56:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:56:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-03 08:56:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-03 08:56:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-03 08:56:53,614 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-03 08:56:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:53,614 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-03 08:56:53,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:56:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-03 08:56:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-03 08:56:53,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:53,615 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-03 08:56:53,615 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:53,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-03 08:56:53,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:53,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:53,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:53,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:53,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:57,517 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 [2018-10-03 08:56:57,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:57,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:57,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:57,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:57,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-10-03 08:56:57,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:56:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:56:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:56:57,656 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-03 08:56:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:57,851 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:56:57,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:56:57,852 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-03 08:56:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:57,853 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:56:57,853 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:56:57,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:56:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:56:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:56:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:56:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:56:57,858 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-03 08:56:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:57,858 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:56:57,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:56:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:56:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:56:57,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:57,862 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-03 08:56:57,862 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:57,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:57,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-03 08:56:57,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:57,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:57,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:57,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:01,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:01,939 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:57:01,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:01,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:01,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-10-03 08:57:01,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:57:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:57:01,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:57:01,991 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-10-03 08:57:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:02,207 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-03 08:57:02,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:57:02,208 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-10-03 08:57:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:02,209 INFO L225 Difference]: With dead ends: 102 [2018-10-03 08:57:02,209 INFO L226 Difference]: Without dead ends: 100 [2018-10-03 08:57:02,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:57:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-03 08:57:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-03 08:57:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:57:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-03 08:57:02,213 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-03 08:57:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:02,213 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-03 08:57:02,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:57:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-03 08:57:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-03 08:57:02,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:02,214 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-03 08:57:02,214 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:02,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-03 08:57:02,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:02,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:02,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:02,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:06,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:06,261 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:06,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:57:06,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:06,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:06,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-10-03 08:57:06,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:57:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:57:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:57:06,406 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-03 08:57:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:07,022 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:57:07,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:57:07,023 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-03 08:57:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:07,023 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:57:07,024 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:57:07,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:57:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:57:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:57:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:57:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:57:07,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-03 08:57:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:07,027 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:57:07,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:57:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:57:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:57:07,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:07,028 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-03 08:57:07,028 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:07,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-03 08:57:07,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:07,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:07,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:07,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:11,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:11,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:11,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-10-03 08:57:11,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:57:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:57:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:57:11,396 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-10-03 08:57:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:11,629 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-03 08:57:11,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:57:11,630 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-10-03 08:57:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:11,631 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:57:11,631 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 08:57:11,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:57:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 08:57:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-03 08:57:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-03 08:57:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-03 08:57:11,634 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-03 08:57:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:11,635 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-03 08:57:11,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:57:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-03 08:57:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 08:57:11,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:11,635 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-03 08:57:11,635 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:11,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-03 08:57:11,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:11,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:11,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:11,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:15,975 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 [2018-10-03 08:57:15,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:16,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:16,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:16,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:16,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-10-03 08:57:16,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:57:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:57:16,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:57:16,101 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-03 08:57:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:16,386 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:57:16,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:57:16,387 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-03 08:57:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:16,388 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:57:16,388 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:57:16,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:57:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:57:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:57:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:57:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:57:16,392 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-03 08:57:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:16,392 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:57:16,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:57:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:57:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:57:16,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:16,392 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-03 08:57:16,393 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:16,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-03 08:57:16,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:16,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:16,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:16,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:16,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:20,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:20,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:20,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-03 08:57:20,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:20,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:20,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-10-03 08:57:20,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:57:20,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:57:20,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:57:20,998 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-10-03 08:57:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:21,192 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-03 08:57:21,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:57:21,193 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-10-03 08:57:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:21,194 INFO L225 Difference]: With dead ends: 106 [2018-10-03 08:57:21,194 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:57:21,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:57:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:57:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-03 08:57:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:57:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-03 08:57:21,199 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-03 08:57:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:21,199 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-03 08:57:21,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:57:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-03 08:57:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:57:21,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:21,200 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-03 08:57:21,201 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:21,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-03 08:57:21,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:21,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:21,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:21,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:25,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:25,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:25,779 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:25,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:25,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:25,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-10-03 08:57:25,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:57:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:57:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:57:25,833 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-03 08:57:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:26,061 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:57:26,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:57:26,061 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-03 08:57:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:26,062 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:57:26,063 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:57:26,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:57:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:57:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:57:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:57:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:57:26,067 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-03 08:57:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:26,067 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:57:26,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:57:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:57:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:57:26,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:26,068 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-03 08:57:26,068 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:26,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-03 08:57:26,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:26,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:26,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:30,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:30,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:30,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-03 08:57:30,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:30,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:30,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-10-03 08:57:30,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:57:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:57:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:57:30,839 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-10-03 08:57:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:31,153 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-03 08:57:31,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:57:31,153 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-10-03 08:57:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:31,154 INFO L225 Difference]: With dead ends: 108 [2018-10-03 08:57:31,155 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 08:57:31,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:57:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 08:57:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 08:57:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:57:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-03 08:57:31,159 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-03 08:57:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:31,159 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-03 08:57:31,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:57:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-03 08:57:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-03 08:57:31,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:31,160 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-03 08:57:31,160 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:31,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-03 08:57:31,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:31,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:31,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:31,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:31,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:35,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:35,979 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 [2018-10-03 08:57:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:36,080 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-03 08:57:36,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:36,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:36,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-10-03 08:57:36,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:57:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:57:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:57:36,139 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-03 08:57:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:36,402 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:57:36,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:57:36,403 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-03 08:57:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:36,403 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:57:36,403 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:57:36,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:57:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:57:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:57:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:57:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:57:36,407 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-03 08:57:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:36,407 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:57:36,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:57:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:57:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:57:36,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:36,407 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-03 08:57:36,408 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:36,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-03 08:57:36,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:36,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:36,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:36,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:36,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:41,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:41,122 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 [2018-10-03 08:57:41,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:41,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:41,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:41,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-10-03 08:57:41,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:57:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:57:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:57:41,274 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-10-03 08:57:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:41,495 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-03 08:57:41,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:57:41,496 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-10-03 08:57:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:41,496 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:57:41,496 INFO L226 Difference]: Without dead ends: 108 [2018-10-03 08:57:41,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:57:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-03 08:57:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-03 08:57:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 08:57:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-03 08:57:41,499 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-03 08:57:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:41,499 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-03 08:57:41,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:57:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-03 08:57:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 08:57:41,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:41,500 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-03 08:57:41,500 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:41,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-03 08:57:41,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:41,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:41,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:41,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:46,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:46,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:46,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:46,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:46,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:46,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:46,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:46,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-10-03 08:57:46,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:57:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:57:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:57:46,474 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-03 08:57:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:46,827 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:57:46,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:57:46,828 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-03 08:57:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:46,829 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:57:46,829 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:57:46,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:57:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:57:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:57:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:57:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:57:46,833 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-03 08:57:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:46,833 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:57:46,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:57:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:57:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:57:46,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:46,834 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-03 08:57:46,834 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:46,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:46,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-03 08:57:46,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:46,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:46,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:46,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:51,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:51,719 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 [2018-10-03 08:57:51,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:51,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-03 08:57:51,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:51,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:51,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:51,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-10-03 08:57:51,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:57:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:57:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:57:51,889 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-10-03 08:57:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:52,152 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-03 08:57:52,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:57:52,153 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-10-03 08:57:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:52,153 INFO L225 Difference]: With dead ends: 112 [2018-10-03 08:57:52,153 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 08:57:52,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:57:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 08:57:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-03 08:57:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 08:57:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-03 08:57:52,156 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-03 08:57:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:52,156 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-03 08:57:52,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:57:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-03 08:57:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-03 08:57:52,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:52,157 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-03 08:57:52,157 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:52,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-03 08:57:52,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:52,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:52,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:52,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:57,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:57,129 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 [2018-10-03 08:57:57,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:57,203 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:57,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:57,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:57,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:57,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2018-10-03 08:57:57,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:57:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:57:57,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:57:57,260 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-03 08:57:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:57,456 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:57:57,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:57:57,456 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-03 08:57:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:57,457 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:57:57,457 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:57:57,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:57:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:57:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:57:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:57:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:57:57,462 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-03 08:57:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:57,462 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:57:57,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:57:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:57:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:57:57,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:57,463 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-03 08:57:57,463 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:57,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-03 08:57:57,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:57,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:57,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:57,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:57,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:58:01,265 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:58:01,271 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:58:01,272 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:58:01 BoogieIcfgContainer [2018-10-03 08:58:01,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:58:01,273 INFO L168 Benchmark]: Toolchain (without parser) took 237551.46 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -172.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 222.6 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2018-10-03 08:58:01,274 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:58:01,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:58:01,275 INFO L168 Benchmark]: Boogie Preprocessor took 21.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:58:01,275 INFO L168 Benchmark]: RCFGBuilder took 308.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:58:01,276 INFO L168 Benchmark]: TraceAbstraction took 237175.74 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -172.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 201.5 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. [2018-10-03 08:58:01,278 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 308.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237175.74 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -172.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 201.5 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 111 with TraceHistMax 107, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 93 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 237.0s OverallTime, 108 OverallIterations, 107 TraceHistogramMax, 19.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 323 SDtfs, 2 SDslu, 4042 SDs, 0 SdLazy, 9970 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11768 GetRequests, 5884 SyntacticMatches, 0 SemanticMatches, 5884 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11130 ImplicationChecksByTransitivity, 197.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 107 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 202.0s InterpolantComputationTime, 11981 NumberOfCodeBlocks, 11981 NumberOfCodeBlocksAsserted, 1662 NumberOfCheckSat, 11768 ConstructedInterpolants, 0 QuantifiedInterpolants, 4186902 SizeOfPredicates, 212 NumberOfNonLiveVariables, 23638 ConjunctsInSsa, 5883 ConjunctsInUnsatCore, 213 InterpolantComputations, 1 PerfectInterpolantSequences, 0/408312 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/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-58-01-286.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-58-01-286.csv Completed graceful shutdown