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/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:20:34,425 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:20:34,427 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:20:34,441 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 23:20:34,473 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 [2018-09-30 23:20:34,488 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:20:34,489 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:20:34,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:20:34,490 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:20:34,490 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:20:34,491 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:20:34,491 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:20:34,491 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:20:34,491 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:20:34,491 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:20:34,492 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:20:34,492 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:20:34,492 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:20:34,492 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:20:34,492 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:20:34,493 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:20:34,493 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:20:34,493 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:20:34,493 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:20:34,493 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:20:34,494 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:20:34,494 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:20:34,494 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:20:34,494 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:20:34,494 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:20:34,495 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:20:34,495 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:20:34,495 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:20:34,495 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:20:34,495 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:20:34,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:20:34,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:20:34,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:20:34,577 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:20:34,578 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:20:34,579 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-30 23:20:34,580 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-30 23:20:34,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:20:34,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:20:34,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:20:34,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:20:34,642 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:20:34,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:20:34,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:20:34,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:20:34,683 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:20:34,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... [2018-09-30 23:20:34,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:20:34,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:20:34,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:20:34,705 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:20:34,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:20:34,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:20:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:20:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:20:35,050 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:20:35,051 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:20:35 BoogieIcfgContainer [2018-09-30 23:20:35,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:20:35,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:20:35,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:20:35,058 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:20:35,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:34" (1/2) ... [2018-09-30 23:20:35,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3518ed6d and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:20:35, skipping insertion in model container [2018-09-30 23:20:35,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:20:35" (2/2) ... [2018-09-30 23:20:35,063 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-30 23:20:35,071 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:20:35,078 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:20:35,125 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:20:35,126 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:20:35,126 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:20:35,126 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:20:35,126 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:20:35,127 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:20:35,127 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:20:35,127 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:20:35,127 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:20:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 23:20:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:20:35,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:35,151 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:20:35,152 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:35,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 23:20:35,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:35,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:35,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:35,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:35,310 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:20:35,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:20:35,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:20:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:20:35,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:20:35,329 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 23:20:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:35,379 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-30 23:20:35,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:20:35,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:20:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:35,396 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:20:35,397 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:20:35,412 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 [2018-09-30 23:20:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:20:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 23:20:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:20:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 23:20:35,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 23:20:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:35,466 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 23:20:35,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:20:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 23:20:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:20:35,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:35,468 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:20:35,468 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:35,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-30 23:20:35,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:35,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:35,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:35,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:35,561 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:20:35,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:20:35,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:20:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:20:35,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:20:35,565 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-30 23:20:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:35,589 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 23:20:35,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:20:35,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 23:20:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:35,591 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:20:35,592 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:20:35,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:20:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:20:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:20:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:20:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-30 23:20:35,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-30 23:20:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:35,596 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-30 23:20:35,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:20:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-30 23:20:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:20:35,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:35,597 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:20:35,597 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:35,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-30 23:20:35,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:35,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:35,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:35,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:35,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:35,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:35,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:35,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:20:35,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:20:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:20:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:20:35,771 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-30 23:20:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:35,800 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-30 23:20:35,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:20:35,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:20:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:35,803 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:20:35,803 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:20:35,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:20:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:20:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:20:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:20:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-30 23:20:35,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-30 23:20:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:35,809 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-30 23:20:35,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:20:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-30 23:20:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:20:35,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:35,811 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 23:20:35,812 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:35,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-30 23:20:35,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:35,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:35,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:35,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 23:20:35,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:35,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:35,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:35,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:35,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:35,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:36,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:36,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-30 23:20:36,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:20:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:20:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:20:36,026 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-30 23:20:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:36,554 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-30 23:20:36,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:20:36,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 23:20:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:36,556 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:20:36,556 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:20:36,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:20:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:20:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-30 23:20:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:20:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 23:20:36,563 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-30 23:20:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:36,563 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 23:20:36,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:20:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 23:20:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:20:36,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:36,565 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-30 23:20:36,565 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:36,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-30 23:20:36,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:36,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:36,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:36,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 23:20:36,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:36,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:36,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:36,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:20:36,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:36,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 23:20:36,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:36,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:20:36,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:20:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:20:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:20:36,751 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-30 23:20:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:36,870 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-30 23:20:36,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:20:36,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-30 23:20:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:36,872 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:20:36,872 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:20:36,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:20:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:20:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:20:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:20:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 23:20:36,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-30 23:20:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:36,878 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 23:20:36,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:20:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 23:20:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:20:36,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:36,879 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-30 23:20:36,879 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:36,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-30 23:20:36,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:36,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:36,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:36,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-30 23:20:37,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:37,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:37,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:37,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:37,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:37,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-30 23:20:37,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:37,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-30 23:20:37,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:20:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:20:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:20:37,135 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-30 23:20:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:37,847 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-30 23:20:37,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:20:37,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-30 23:20:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:37,849 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:20:37,849 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:20:37,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:20:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:20:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-30 23:20:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:20:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-30 23:20:37,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-30 23:20:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:37,857 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-30 23:20:37,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:20:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-30 23:20:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:20:37,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:37,859 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-30 23:20:37,859 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:37,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:37,859 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-30 23:20:37,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:37,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:37,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:37,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-30 23:20:38,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:38,029 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:38,049 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:20:38,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:38,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-30 23:20:38,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-30 23:20:38,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:20:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:20:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:20:38,163 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-30 23:20:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:38,802 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-30 23:20:38,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:20:38,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-30 23:20:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:38,804 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:20:38,804 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:20:38,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:20:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-30 23:20:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:20:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-30 23:20:38,815 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-30 23:20:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:38,816 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-30 23:20:38,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:20:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-30 23:20:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:20:38,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:38,817 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-30 23:20:38,817 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:38,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-30 23:20:38,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:38,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:38,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:38,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-30 23:20:38,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:38,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:38,998 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:20:38,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:39,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-30 23:20:39,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:39,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:20:39,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:20:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:20:39,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:20:39,038 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-30 23:20:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:39,081 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-30 23:20:39,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:20:39,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-30 23:20:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:39,084 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:20:39,084 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:20:39,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:20:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:20:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:20:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:20:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-30 23:20:39,094 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-30 23:20:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:39,094 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-30 23:20:39,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:20:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-30 23:20:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:20:39,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:39,096 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-30 23:20:39,096 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:39,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-30 23:20:39,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:39,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:39,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:39,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-30 23:20:39,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:39,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:39,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-30 23:20:39,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:39,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-30 23:20:39,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:20:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:20:39,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:20:39,519 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-30 23:20:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:40,814 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-30 23:20:40,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:20:40,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-30 23:20:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:40,816 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:20:40,816 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:20:40,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:20:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:20:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-30 23:20:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:20:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-30 23:20:40,830 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-30 23:20:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:40,830 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-30 23:20:40,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:20:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-30 23:20:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:20:40,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:40,832 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-30 23:20:40,833 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:40,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-30 23:20:40,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:40,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:40,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:40,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-30 23:20:40,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:40,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:41,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:41,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:41,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:41,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-30 23:20:41,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:41,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-30 23:20:41,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:20:41,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:20:41,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:20:41,342 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-30 23:20:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:42,476 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-30 23:20:42,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:20:42,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-30 23:20:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:42,480 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:20:42,480 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:20:42,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:20:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:20:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-30 23:20:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:20:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-30 23:20:42,506 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-30 23:20:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:42,506 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-30 23:20:42,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:20:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-30 23:20:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:20:42,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:42,511 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-30 23:20:42,511 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:42,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-30 23:20:42,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:42,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:42,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:42,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-30 23:20:42,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:42,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:42,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:43,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:20:43,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:43,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-30 23:20:43,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:43,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-30 23:20:43,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:20:43,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:20:43,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:20:43,298 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-30 23:20:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:47,177 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-30 23:20:47,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:20:47,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-30 23:20:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:47,180 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:20:47,180 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:20:47,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:20:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:20:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-30 23:20:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 23:20:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-30 23:20:47,203 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-30 23:20:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:47,203 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-30 23:20:47,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:20:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-30 23:20:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 23:20:47,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:47,205 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-30 23:20:47,205 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:47,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:47,206 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-30 23:20:47,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:47,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:47,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:47,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-30 23:20:47,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:47,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:47,685 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:47,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:47,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:47,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-30 23:20:47,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:47,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:20:47,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:20:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:20:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:20:47,792 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-30 23:20:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:48,003 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-30 23:20:48,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:20:48,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-30 23:20:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:48,005 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:20:48,005 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:20:48,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:20:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:20:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-30 23:20:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:20:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-30 23:20:48,030 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-30 23:20:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:48,030 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-30 23:20:48,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:20:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-30 23:20:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 23:20:48,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:48,034 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-30 23:20:48,035 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:48,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-30 23:20:48,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:48,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:48,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:48,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 23:20:48,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:48,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:48,231 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:48,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:20:48,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:48,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 23:20:48,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:48,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:20:48,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:20:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:20:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:20:48,400 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-30 23:20:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:48,572 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-30 23:20:48,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:20:48,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-30 23:20:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:48,573 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:20:48,573 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:20:48,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:20:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:20:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-30 23:20:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:20:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-30 23:20:48,597 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-30 23:20:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:48,598 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-30 23:20:48,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:20:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-30 23:20:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 23:20:48,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:48,599 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-30 23:20:48,600 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:48,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-30 23:20:48,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:48,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:48,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:48,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-30 23:20:48,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:48,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:48,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:48,951 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-30 23:20:48,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:48,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-30 23:20:49,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:49,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:20:49,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:20:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:20:49,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:20:49,013 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-30 23:20:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:49,377 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-30 23:20:49,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:20:49,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-30 23:20:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:49,379 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:20:49,379 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:20:49,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:20:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:20:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-30 23:20:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 23:20:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-30 23:20:49,405 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-30 23:20:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:49,406 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-30 23:20:49,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:20:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-30 23:20:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 23:20:49,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:49,408 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-30 23:20:49,408 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:49,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:49,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-30 23:20:49,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:49,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:49,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:49,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 23:20:49,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:49,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:49,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 23:20:49,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:49,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:20:49,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:20:49,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:20:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:20:49,890 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-30 23:20:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:50,052 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-30 23:20:50,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:20:50,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-30 23:20:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:50,053 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:20:50,053 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:20:50,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:20:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:20:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-30 23:20:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:20:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-30 23:20:50,081 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-30 23:20:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:50,081 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-30 23:20:50,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:20:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-30 23:20:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 23:20:50,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:50,083 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-30 23:20:50,084 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:50,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-30 23:20:50,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:50,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:50,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:50,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-30 23:20:50,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:50,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:50,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:50,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:50,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:50,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-30 23:20:50,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:50,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:20:50,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:20:50,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:20:50,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:20:50,512 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-30 23:20:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:50,607 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-30 23:20:50,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:20:50,607 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-30 23:20:50,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:50,609 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:20:50,609 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:20:50,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:20:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:20:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-30 23:20:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 23:20:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-30 23:20:50,640 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-30 23:20:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:50,641 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-30 23:20:50,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:20:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-30 23:20:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 23:20:50,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:50,642 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-30 23:20:50,643 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:50,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-30 23:20:50,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:50,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:50,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:50,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 23:20:50,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:50,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:50,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:51,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-30 23:20:51,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:51,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 23:20:51,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:51,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:20:51,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:20:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:20:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:20:51,093 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-30 23:20:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:51,246 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-30 23:20:51,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:20:51,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-30 23:20:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:51,248 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:20:51,248 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:20:51,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:20:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:20:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-30 23:20:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 23:20:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-30 23:20:51,283 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-30 23:20:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:51,284 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-30 23:20:51,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:20:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-30 23:20:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 23:20:51,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:51,286 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-30 23:20:51,286 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:51,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-30 23:20:51,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:51,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:51,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:51,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:51,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-30 23:20:52,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:52,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:52,375 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:52,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:52,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:52,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-30 23:20:52,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:52,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:20:52,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:20:52,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:20:52,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:20:52,542 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-30 23:20:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:52,643 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-30 23:20:52,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:20:52,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-30 23:20:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:52,645 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:20:52,645 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:20:52,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:20:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:20:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-30 23:20:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 23:20:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-30 23:20:52,676 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-30 23:20:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:52,676 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-30 23:20:52,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:20:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-30 23:20:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 23:20:52,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:52,679 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-30 23:20:52,679 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:52,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-30 23:20:52,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:52,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:52,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:52,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 23:20:53,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:53,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:53,408 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:53,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 23:20:53,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:53,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 23:20:53,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:53,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:20:53,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:20:53,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:20:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:20:53,712 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-30 23:20:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:53,889 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-30 23:20:53,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:20:53,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-30 23:20:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:53,890 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:20:53,891 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:20:53,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:20:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:20:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-30 23:20:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 23:20:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-30 23:20:53,926 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-30 23:20:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:53,926 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-30 23:20:53,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:20:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-30 23:20:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 23:20:53,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:53,928 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-30 23:20:53,928 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:53,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-30 23:20:53,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:53,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:53,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:53,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:53,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-30 23:20:54,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:54,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:54,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:54,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 23:20:54,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:54,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-30 23:20:54,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:54,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:20:54,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:20:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:20:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:20:54,759 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-30 23:20:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:54,907 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-30 23:20:54,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:20:54,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-30 23:20:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:54,909 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:20:54,909 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:20:54,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:20:54,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:20:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-30 23:20:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 23:20:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-30 23:20:54,949 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-30 23:20:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:54,949 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-30 23:20:54,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:20:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-30 23:20:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-30 23:20:54,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:54,951 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-30 23:20:54,951 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:54,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:54,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-30 23:20:54,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:54,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:54,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:54,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 23:20:55,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:55,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:55,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 23:20:55,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:55,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:20:55,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:20:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:20:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:20:55,665 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-30 23:20:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:55,802 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-30 23:20:55,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:20:55,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-30 23:20:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:55,803 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:20:55,803 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:20:55,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:20:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:20:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-30 23:20:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 23:20:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-30 23:20:55,849 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-30 23:20:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:55,849 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-30 23:20:55,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:20:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-30 23:20:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 23:20:55,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:55,851 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-30 23:20:55,851 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:55,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-30 23:20:55,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:55,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:55,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:55,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-30 23:20:56,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:56,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:56,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:56,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:56,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:56,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-30 23:20:56,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:56,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:20:56,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:20:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:20:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:20:56,523 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-30 23:20:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:56,671 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-30 23:20:56,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:20:56,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-30 23:20:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:56,674 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:20:56,674 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:20:56,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:20:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:20:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-30 23:20:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 23:20:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-30 23:20:56,720 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-30 23:20:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:56,720 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-30 23:20:56,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:20:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-30 23:20:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-30 23:20:56,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:56,722 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-30 23:20:56,722 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:56,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-30 23:20:56,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:56,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:56,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:56,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:56,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 23:20:57,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:57,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:57,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:57,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-30 23:20:57,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:57,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 23:20:58,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:58,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:20:58,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:20:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:20:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:20:58,023 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-30 23:20:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:58,168 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-30 23:20:58,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:20:58,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-30 23:20:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:58,170 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:20:58,170 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:20:58,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:20:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:20:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-30 23:20:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-30 23:20:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-30 23:20:58,221 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-30 23:20:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:58,222 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-30 23:20:58,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:20:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-30 23:20:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-30 23:20:58,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:58,223 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-30 23:20:58,223 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:58,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:58,224 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-30 23:20:58,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:58,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:58,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:58,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-30 23:20:59,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:59,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:59,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:59,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:59,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:59,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-30 23:20:59,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:59,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:20:59,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:20:59,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:20:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:20:59,235 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-30 23:20:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:59,391 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-30 23:20:59,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:20:59,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-30 23:20:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:59,397 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:20:59,397 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:20:59,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:20:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:20:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-30 23:20:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-30 23:20:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-30 23:20:59,468 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-30 23:20:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:59,468 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-30 23:20:59,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:20:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-30 23:20:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-30 23:20:59,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:59,470 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-30 23:20:59,470 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:59,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-30 23:20:59,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:59,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:59,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:59,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-30 23:21:00,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:00,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:00,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:00,406 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-30 23:21:00,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:00,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-30 23:21:00,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:00,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:21:00,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:21:00,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:21:00,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:21:00,489 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-30 23:21:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:00,645 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-30 23:21:00,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:21:00,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-30 23:21:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:00,647 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:21:00,647 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:21:00,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:21:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:21:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-30 23:21:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 23:21:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-30 23:21:00,706 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-30 23:21:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:00,707 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-30 23:21:00,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:21:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-30 23:21:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-30 23:21:00,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:00,708 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-30 23:21:00,708 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:00,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-30 23:21:00,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:00,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:00,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:00,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:00,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-30 23:21:01,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:01,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:01,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:01,490 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-30 23:21:01,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:01,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-30 23:21:01,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:01,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:21:01,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:21:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:21:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:21:01,576 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-30 23:21:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:02,131 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-30 23:21:02,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:21:02,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-30 23:21:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:02,133 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:21:02,134 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:21:02,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:21:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:21:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-30 23:21:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 23:21:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-30 23:21:02,238 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-30 23:21:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:02,238 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-30 23:21:02,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:21:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-30 23:21:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-30 23:21:02,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:02,241 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-30 23:21:02,241 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:02,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-30 23:21:02,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:02,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:02,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:02,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:02,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-30 23:21:04,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:04,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:04,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-30 23:21:04,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:04,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:21:04,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:21:04,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:21:04,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:21:04,571 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-30 23:21:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:05,519 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-30 23:21:05,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:21:05,519 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-30 23:21:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:05,521 INFO L225 Difference]: With dead ends: 293 [2018-09-30 23:21:05,521 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:21:05,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:21:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:21:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-30 23:21:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-30 23:21:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-30 23:21:05,630 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-30 23:21:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:05,631 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-30 23:21:05,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:21:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-30 23:21:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-30 23:21:05,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:05,633 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-30 23:21:05,633 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:05,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-30 23:21:05,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:05,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:05,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:05,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:05,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-30 23:21:06,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:06,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:06,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:06,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:06,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:06,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-30 23:21:06,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:06,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:21:06,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:21:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:21:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:21:06,771 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-30 23:21:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,181 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-30 23:21:07,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:21:07,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-30 23:21:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,183 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:21:07,183 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 23:21:07,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:21:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 23:21:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-30 23:21:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-30 23:21:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-30 23:21:07,284 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-30 23:21:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,284 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-30 23:21:07,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:21:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-30 23:21:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-30 23:21:07,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,286 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-30 23:21:07,287 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-30 23:21:07,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:07,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 23:21:09,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:09,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:09,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:09,923 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-30 23:21:09,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:09,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 23:21:10,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:10,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:21:10,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:21:10,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:21:10,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:21:10,050 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-30 23:21:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:10,302 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-30 23:21:10,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:21:10,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-30 23:21:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:10,303 INFO L225 Difference]: With dead ends: 317 [2018-09-30 23:21:10,304 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 23:21:10,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:21:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 23:21:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-30 23:21:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-30 23:21:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-30 23:21:10,420 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-30 23:21:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:10,420 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-30 23:21:10,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:21:10,420 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-30 23:21:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-30 23:21:10,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:10,422 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-30 23:21:10,423 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:10,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:10,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-30 23:21:10,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:10,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:10,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:10,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-30 23:21:11,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:11,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:11,765 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:11,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:11,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:11,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-30 23:21:12,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:12,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:21:12,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:21:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:21:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:21:12,060 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-30 23:21:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:12,286 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-30 23:21:12,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:21:12,287 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-30 23:21:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:12,288 INFO L225 Difference]: With dead ends: 329 [2018-09-30 23:21:12,289 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 23:21:12,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:21:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 23:21:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-30 23:21:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-30 23:21:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-30 23:21:12,385 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-30 23:21:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:12,385 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-30 23:21:12,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:21:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-30 23:21:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-30 23:21:12,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:12,387 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-30 23:21:12,388 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:12,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-30 23:21:12,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:12,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:12,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:12,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 23:21:13,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:13,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:13,269 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:13,783 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-30 23:21:13,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:13,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 23:21:13,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:13,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:21:13,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:21:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:21:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:21:13,898 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-30 23:21:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:14,137 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-30 23:21:14,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:21:14,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-30 23:21:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:14,139 INFO L225 Difference]: With dead ends: 341 [2018-09-30 23:21:14,139 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 23:21:14,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:21:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 23:21:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-30 23:21:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-30 23:21:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-30 23:21:14,239 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-30 23:21:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:14,239 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-30 23:21:14,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:21:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-30 23:21:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-30 23:21:14,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:14,241 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-30 23:21:14,241 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:14,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-30 23:21:14,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:14,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:14,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:14,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-30 23:21:15,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:15,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:15,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:15,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-30 23:21:15,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:15,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-30 23:21:15,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:15,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:21:15,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:21:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:21:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:21:15,818 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-30 23:21:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:16,153 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-30 23:21:16,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:21:16,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-30 23:21:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:16,158 INFO L225 Difference]: With dead ends: 353 [2018-09-30 23:21:16,158 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 23:21:16,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:21:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 23:21:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-30 23:21:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-30 23:21:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-30 23:21:16,274 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-30 23:21:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:16,275 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-30 23:21:16,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:21:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-30 23:21:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-30 23:21:16,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:16,276 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-30 23:21:16,276 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:16,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-30 23:21:16,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:16,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:16,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:16,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 23:21:17,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:17,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:17,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:17,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 23:21:17,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:17,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:21:17,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:21:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:21:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:21:17,434 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-30 23:21:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:18,365 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-30 23:21:18,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:21:18,365 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-30 23:21:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:18,367 INFO L225 Difference]: With dead ends: 365 [2018-09-30 23:21:18,367 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 23:21:18,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:21:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 23:21:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-30 23:21:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-30 23:21:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-30 23:21:18,493 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-30 23:21:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:18,493 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-30 23:21:18,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:21:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-30 23:21:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-30 23:21:18,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:18,495 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-30 23:21:18,495 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:18,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-30 23:21:18,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:18,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:18,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:18,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:18,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-30 23:21:19,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:19,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:19,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:19,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:19,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:19,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-30 23:21:19,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:19,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:21:19,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:21:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:21:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:21:19,849 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-30 23:21:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:20,112 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-30 23:21:20,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:21:20,113 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-30 23:21:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:20,114 INFO L225 Difference]: With dead ends: 377 [2018-09-30 23:21:20,114 INFO L226 Difference]: Without dead ends: 375 [2018-09-30 23:21:20,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:21:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-30 23:21:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-30 23:21:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-30 23:21:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-30 23:21:20,238 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-30 23:21:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:20,239 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-30 23:21:20,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:21:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-30 23:21:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-30 23:21:20,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:20,241 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-30 23:21:20,241 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:20,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-30 23:21:20,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:20,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:20,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:20,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:20,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 23:21:21,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:21,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:21,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:22,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-30 23:21:22,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:22,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 23:21:22,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:22,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:21:22,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:21:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:21:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:21:22,361 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-30 23:21:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:22,675 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-30 23:21:22,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:21:22,675 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-30 23:21:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:22,677 INFO L225 Difference]: With dead ends: 389 [2018-09-30 23:21:22,677 INFO L226 Difference]: Without dead ends: 387 [2018-09-30 23:21:22,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:21:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-30 23:21:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-30 23:21:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-30 23:21:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-30 23:21:22,801 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-30 23:21:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:22,802 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-30 23:21:22,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:21:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-30 23:21:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-30 23:21:22,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:22,804 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-30 23:21:22,805 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:22,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-30 23:21:22,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:22,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:22,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:22,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-30 23:21:23,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:23,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:23,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:23,777 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:23,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:23,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-30 23:21:23,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:23,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:21:23,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:21:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:21:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:21:23,947 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-30 23:21:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:24,242 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-30 23:21:24,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:21:24,242 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-30 23:21:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:24,244 INFO L225 Difference]: With dead ends: 401 [2018-09-30 23:21:24,244 INFO L226 Difference]: Without dead ends: 399 [2018-09-30 23:21:24,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:21:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-30 23:21:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-30 23:21:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-30 23:21:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-30 23:21:24,385 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-30 23:21:24,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:24,385 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-30 23:21:24,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:21:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-30 23:21:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-30 23:21:24,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:24,388 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-30 23:21:24,388 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:24,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-30 23:21:24,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:24,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:24,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:24,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:24,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 23:21:25,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:25,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:25,555 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:26,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-30 23:21:26,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:26,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 23:21:26,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:26,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:21:26,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:21:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:21:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:21:26,327 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-30 23:21:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:26,624 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-30 23:21:26,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:21:26,624 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-30 23:21:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:26,626 INFO L225 Difference]: With dead ends: 413 [2018-09-30 23:21:26,626 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 23:21:26,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:21:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 23:21:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-30 23:21:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-30 23:21:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-30 23:21:26,773 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-30 23:21:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:26,773 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-30 23:21:26,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:21:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-30 23:21:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-30 23:21:26,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:26,776 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-30 23:21:26,776 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:26,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:26,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-30 23:21:26,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:26,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:26,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:26,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:26,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-30 23:21:27,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:27,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:27,528 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:28,164 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-30 23:21:28,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:28,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-30 23:21:28,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:28,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:21:28,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:21:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:21:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:21:28,336 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-30 23:21:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:28,675 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-30 23:21:28,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:21:28,676 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-30 23:21:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:28,678 INFO L225 Difference]: With dead ends: 425 [2018-09-30 23:21:28,678 INFO L226 Difference]: Without dead ends: 423 [2018-09-30 23:21:28,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:21:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-30 23:21:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-30 23:21:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-30 23:21:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-30 23:21:28,840 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-30 23:21:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:28,840 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-30 23:21:28,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:21:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-30 23:21:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-30 23:21:28,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:28,843 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-30 23:21:28,843 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:28,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-30 23:21:28,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:28,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:28,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:28,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-30 23:21:29,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:29,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:29,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:30,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-30 23:21:30,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:30,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:21:30,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:21:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:21:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:21:30,311 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-30 23:21:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:30,658 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-30 23:21:30,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:21:30,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-30 23:21:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:30,660 INFO L225 Difference]: With dead ends: 437 [2018-09-30 23:21:30,660 INFO L226 Difference]: Without dead ends: 435 [2018-09-30 23:21:30,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:21:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-30 23:21:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-30 23:21:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-30 23:21:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-30 23:21:30,821 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-30 23:21:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:30,821 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-30 23:21:30,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:21:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-30 23:21:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-30 23:21:30,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:30,824 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-30 23:21:30,824 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:30,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-30 23:21:30,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:30,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:30,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:30,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-30 23:21:31,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:31,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:31,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:32,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:32,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:32,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-30 23:21:32,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:32,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:21:32,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:21:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:21:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:21:32,263 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-30 23:21:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:32,807 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-30 23:21:32,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:21:32,808 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-30 23:21:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:32,809 INFO L225 Difference]: With dead ends: 449 [2018-09-30 23:21:32,809 INFO L226 Difference]: Without dead ends: 447 [2018-09-30 23:21:32,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:21:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-30 23:21:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-30 23:21:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-30 23:21:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-30 23:21:32,975 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-30 23:21:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:32,975 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-30 23:21:32,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:21:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-30 23:21:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-30 23:21:32,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:32,978 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-30 23:21:32,979 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:32,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-30 23:21:32,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:32,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:32,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:32,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-30 23:21:34,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:34,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:34,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:34,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-30 23:21:34,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:34,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-30 23:21:35,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:35,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:21:35,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:21:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:21:35,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:35,173 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-30 23:21:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:35,529 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-30 23:21:35,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:21:35,530 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-30 23:21:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:35,532 INFO L225 Difference]: With dead ends: 461 [2018-09-30 23:21:35,532 INFO L226 Difference]: Without dead ends: 459 [2018-09-30 23:21:35,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-30 23:21:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-30 23:21:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-30 23:21:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-30 23:21:35,725 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-30 23:21:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:35,725 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-30 23:21:35,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:21:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-30 23:21:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-30 23:21:35,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:35,728 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-30 23:21:35,728 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:35,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-30 23:21:35,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:35,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:35,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:35,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-30 23:21:36,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:36,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:36,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:37,042 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:37,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:37,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-30 23:21:37,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:37,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:21:37,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:21:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:21:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:37,225 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-30 23:21:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:37,656 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-30 23:21:37,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:21:37,657 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-30 23:21:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:37,658 INFO L225 Difference]: With dead ends: 473 [2018-09-30 23:21:37,659 INFO L226 Difference]: Without dead ends: 471 [2018-09-30 23:21:37,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-30 23:21:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-30 23:21:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-30 23:21:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-30 23:21:37,861 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-30 23:21:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:37,861 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-30 23:21:37,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:21:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-30 23:21:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-30 23:21:37,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:37,864 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-30 23:21:37,864 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:37,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-30 23:21:37,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:37,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:37,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:37,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:37,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-30 23:21:39,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:39,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:39,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:40,481 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-30 23:21:40,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:40,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-30 23:21:40,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:40,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:21:40,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:21:40,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:21:40,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:40,666 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-30 23:21:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:41,257 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-30 23:21:41,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:21:41,257 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-30 23:21:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:41,259 INFO L225 Difference]: With dead ends: 485 [2018-09-30 23:21:41,259 INFO L226 Difference]: Without dead ends: 483 [2018-09-30 23:21:41,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-30 23:21:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-30 23:21:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-30 23:21:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-30 23:21:41,465 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-30 23:21:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:41,466 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-30 23:21:41,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:21:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-30 23:21:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-30 23:21:41,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:41,468 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-30 23:21:41,468 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:41,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-30 23:21:41,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:41,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:41,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-30 23:21:42,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:42,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:42,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:43,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-30 23:21:43,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:43,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-30 23:21:43,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:43,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:21:43,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:21:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:21:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:43,649 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-30 23:21:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:44,118 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-30 23:21:44,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:21:44,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-30 23:21:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:44,120 INFO L225 Difference]: With dead ends: 497 [2018-09-30 23:21:44,120 INFO L226 Difference]: Without dead ends: 495 [2018-09-30 23:21:44,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-30 23:21:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-30 23:21:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-30 23:21:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-30 23:21:44,369 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-30 23:21:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:44,370 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-30 23:21:44,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:21:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-30 23:21:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-30 23:21:44,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:44,372 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-30 23:21:44,373 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:44,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-30 23:21:44,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:44,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:44,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:44,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:44,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-30 23:21:45,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:45,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:45,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:45,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-30 23:21:45,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:45,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:21:45,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:21:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:21:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:45,964 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-30 23:21:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:46,395 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-30 23:21:46,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:21:46,396 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-30 23:21:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:46,398 INFO L225 Difference]: With dead ends: 509 [2018-09-30 23:21:46,398 INFO L226 Difference]: Without dead ends: 507 [2018-09-30 23:21:46,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-30 23:21:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-30 23:21:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-30 23:21:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-30 23:21:46,621 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-30 23:21:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:46,621 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-30 23:21:46,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:21:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-30 23:21:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-30 23:21:46,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:46,624 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-30 23:21:46,624 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:46,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-30 23:21:46,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:46,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:46,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:46,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:46,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-30 23:21:47,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:47,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:47,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:48,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:48,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:48,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-30 23:21:48,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:48,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:21:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:21:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:21:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:48,437 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-30 23:21:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:48,908 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-30 23:21:48,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:21:48,908 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-30 23:21:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:48,910 INFO L225 Difference]: With dead ends: 521 [2018-09-30 23:21:48,910 INFO L226 Difference]: Without dead ends: 519 [2018-09-30 23:21:48,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-30 23:21:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-30 23:21:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-30 23:21:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-30 23:21:49,122 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-30 23:21:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:49,123 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-30 23:21:49,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:21:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-30 23:21:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-30 23:21:49,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:49,125 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-30 23:21:49,125 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:49,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-30 23:21:49,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:49,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-30 23:21:50,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:50,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:50,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:51,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-30 23:21:51,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:51,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-30 23:21:51,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:51,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:21:51,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:21:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:21:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:51,709 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-30 23:21:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:52,894 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-30 23:21:52,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:21:52,896 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-30 23:21:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:52,898 INFO L225 Difference]: With dead ends: 533 [2018-09-30 23:21:52,898 INFO L226 Difference]: Without dead ends: 531 [2018-09-30 23:21:52,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-30 23:21:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-30 23:21:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-30 23:21:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-30 23:21:53,165 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-30 23:21:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:53,165 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-30 23:21:53,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:21:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-30 23:21:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-30 23:21:53,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:53,167 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-30 23:21:53,168 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:53,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-30 23:21:53,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:53,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:53,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:53,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:53,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-30 23:21:54,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:54,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:54,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:54,800 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:54,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:54,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-30 23:21:55,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:55,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:21:55,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:21:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:21:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:55,013 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-30 23:21:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:55,613 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-30 23:21:55,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:21:55,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-30 23:21:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:55,618 INFO L225 Difference]: With dead ends: 545 [2018-09-30 23:21:55,618 INFO L226 Difference]: Without dead ends: 543 [2018-09-30 23:21:55,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-30 23:21:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-30 23:21:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-30 23:21:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-30 23:21:55,900 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-30 23:21:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:55,900 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-30 23:21:55,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:21:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-30 23:21:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-30 23:21:55,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:55,902 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-30 23:21:55,903 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:55,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-30 23:21:55,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:55,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:55,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:55,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-30 23:21:57,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:57,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:57,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:58,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-30 23:21:58,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:58,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-30 23:21:58,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:58,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:21:58,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:21:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:21:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:58,445 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-30 23:21:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:59,048 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-30 23:21:59,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:21:59,049 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-30 23:21:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:59,051 INFO L225 Difference]: With dead ends: 557 [2018-09-30 23:21:59,051 INFO L226 Difference]: Without dead ends: 555 [2018-09-30 23:21:59,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-30 23:21:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-30 23:21:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-30 23:21:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-30 23:21:59,342 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-30 23:21:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:59,343 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-30 23:21:59,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:21:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-30 23:21:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-30 23:21:59,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:59,345 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-30 23:21:59,345 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:59,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:59,346 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-30 23:21:59,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:59,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:59,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:59,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:59,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-30 23:22:00,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:00,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:00,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:01,782 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-30 23:22:01,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:01,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-30 23:22:02,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:02,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:22:02,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:22:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:22:02,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:22:02,031 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-30 23:22:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:02,596 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-30 23:22:02,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:22:02,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-30 23:22:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:02,600 INFO L225 Difference]: With dead ends: 569 [2018-09-30 23:22:02,600 INFO L226 Difference]: Without dead ends: 567 [2018-09-30 23:22:02,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:22:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-30 23:22:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-30 23:22:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-30 23:22:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-30 23:22:02,886 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-30 23:22:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:02,886 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-30 23:22:02,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:22:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-30 23:22:02,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-30 23:22:02,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:02,889 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-30 23:22:02,889 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:02,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-30 23:22:02,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:02,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:02,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:02,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:02,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-30 23:22:04,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:04,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:04,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:04,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-30 23:22:04,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:04,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:22:04,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:22:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:22:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:22:04,642 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-30 23:22:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:05,197 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-30 23:22:05,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:22:05,197 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-30 23:22:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:05,200 INFO L225 Difference]: With dead ends: 581 [2018-09-30 23:22:05,200 INFO L226 Difference]: Without dead ends: 579 [2018-09-30 23:22:05,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:22:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-30 23:22:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-30 23:22:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-30 23:22:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-30 23:22:05,479 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-30 23:22:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:05,479 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-30 23:22:05,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:22:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-30 23:22:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-30 23:22:05,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:05,483 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-30 23:22:05,483 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:05,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-30 23:22:05,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:05,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:05,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:05,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:05,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-30 23:22:06,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:06,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:06,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:06,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:06,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:06,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-30 23:22:07,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:07,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:22:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:22:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:22:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:22:07,245 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-30 23:22:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:07,891 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-30 23:22:07,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:22:07,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-30 23:22:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:07,894 INFO L225 Difference]: With dead ends: 593 [2018-09-30 23:22:07,894 INFO L226 Difference]: Without dead ends: 591 [2018-09-30 23:22:07,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:22:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-30 23:22:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-30 23:22:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-30 23:22:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-30 23:22:08,253 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-30 23:22:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:08,254 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-30 23:22:08,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:22:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-30 23:22:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-30 23:22:08,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:08,256 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-30 23:22:08,257 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:08,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-30 23:22:08,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:08,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:08,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:08,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-30 23:22:09,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:09,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:09,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:10,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-30 23:22:10,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:10,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-30 23:22:11,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:11,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:22:11,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:22:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:22:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:22:11,076 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-30 23:22:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:11,659 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-30 23:22:11,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:22:11,659 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-30 23:22:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:11,661 INFO L225 Difference]: With dead ends: 605 [2018-09-30 23:22:11,661 INFO L226 Difference]: Without dead ends: 603 [2018-09-30 23:22:11,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:22:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-30 23:22:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-30 23:22:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-30 23:22:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-30 23:22:11,963 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-30 23:22:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:11,963 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-30 23:22:11,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:22:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-30 23:22:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-30 23:22:11,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:11,966 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-30 23:22:11,966 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:11,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-30 23:22:11,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:11,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:11,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-30 23:22:13,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:13,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:13,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:13,715 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:13,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:13,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-30 23:22:13,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:13,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:22:13,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:22:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:22:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:22:13,982 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-30 23:22:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:14,593 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-30 23:22:14,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:22:14,594 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-30 23:22:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:14,596 INFO L225 Difference]: With dead ends: 617 [2018-09-30 23:22:14,596 INFO L226 Difference]: Without dead ends: 615 [2018-09-30 23:22:14,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:22:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-30 23:22:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-30 23:22:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-30 23:22:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-30 23:22:14,942 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-30 23:22:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:14,942 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-30 23:22:14,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:22:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-30 23:22:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-30 23:22:14,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:14,945 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-30 23:22:14,945 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:14,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-30 23:22:14,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:14,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:14,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:14,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:14,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-30 23:22:16,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:16,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:16,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:17,720 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-30 23:22:17,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:17,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-30 23:22:18,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:18,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:22:18,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:22:18,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:22:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:22:18,023 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-30 23:22:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:18,685 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-30 23:22:18,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:22:18,685 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-30 23:22:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:18,687 INFO L225 Difference]: With dead ends: 629 [2018-09-30 23:22:18,687 INFO L226 Difference]: Without dead ends: 627 [2018-09-30 23:22:18,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:22:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-30 23:22:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-30 23:22:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-30 23:22:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-30 23:22:19,033 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-30 23:22:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:19,033 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-30 23:22:19,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:22:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-30 23:22:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-30 23:22:19,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:19,036 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-30 23:22:19,036 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:19,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:19,036 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-30 23:22:19,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:19,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:19,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:19,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:19,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-30 23:22:20,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:20,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:20,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:22,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-30 23:22:22,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:22,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-30 23:22:22,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:22,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:22:22,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:22:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:22:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:22:22,602 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-30 23:22:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:23,273 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-30 23:22:23,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:22:23,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-30 23:22:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:23,276 INFO L225 Difference]: With dead ends: 641 [2018-09-30 23:22:23,276 INFO L226 Difference]: Without dead ends: 639 [2018-09-30 23:22:23,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:22:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-30 23:22:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-30 23:22:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-30 23:22:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-30 23:22:23,629 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-30 23:22:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:23,629 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-30 23:22:23,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:22:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-30 23:22:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-30 23:22:23,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:23,632 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-30 23:22:23,632 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:23,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-30 23:22:23,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:23,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:23,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:23,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:23,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-30 23:22:25,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:25,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:25,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:25,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-30 23:22:25,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:25,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:22:25,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:22:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:22:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:22:25,726 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-30 23:22:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:26,422 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-30 23:22:26,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:22:26,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-30 23:22:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:26,424 INFO L225 Difference]: With dead ends: 653 [2018-09-30 23:22:26,425 INFO L226 Difference]: Without dead ends: 651 [2018-09-30 23:22:26,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:22:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-30 23:22:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-30 23:22:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-30 23:22:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-30 23:22:26,832 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-30 23:22:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:26,832 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-30 23:22:26,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:22:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-30 23:22:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-30 23:22:26,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:26,836 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-30 23:22:26,836 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:26,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:26,836 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-30 23:22:26,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:26,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:26,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:26,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:26,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-30 23:22:28,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:28,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:28,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:28,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:28,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:28,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-30 23:22:28,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:28,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:22:28,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:22:28,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:22:28,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:22:28,985 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-30 23:22:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:29,681 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-30 23:22:29,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:22:29,681 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-30 23:22:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:29,683 INFO L225 Difference]: With dead ends: 665 [2018-09-30 23:22:29,683 INFO L226 Difference]: Without dead ends: 663 [2018-09-30 23:22:29,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:22:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-30 23:22:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-30 23:22:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-30 23:22:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-30 23:22:30,059 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-30 23:22:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:30,060 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-30 23:22:30,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:22:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-30 23:22:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-30 23:22:30,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:30,063 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-30 23:22:30,063 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:30,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-30 23:22:30,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:30,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:30,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-30 23:22:31,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:31,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:31,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:33,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-30 23:22:33,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:33,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-30 23:22:33,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:33,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:22:33,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:22:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:22:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:22:33,778 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-30 23:22:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:34,538 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-30 23:22:34,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:22:34,539 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-30 23:22:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:34,541 INFO L225 Difference]: With dead ends: 677 [2018-09-30 23:22:34,541 INFO L226 Difference]: Without dead ends: 675 [2018-09-30 23:22:34,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:22:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-30 23:22:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-30 23:22:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-30 23:22:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-30 23:22:34,927 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-30 23:22:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:34,927 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-30 23:22:34,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:22:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-30 23:22:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-30 23:22:34,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:34,930 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-30 23:22:34,931 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:34,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-30 23:22:34,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:34,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:34,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-30 23:22:36,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:36,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:36,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:37,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:37,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:37,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-30 23:22:37,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:37,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:22:37,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:22:37,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:22:37,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:22:37,571 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-30 23:22:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:38,345 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-30 23:22:38,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:22:38,345 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-30 23:22:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:38,348 INFO L225 Difference]: With dead ends: 689 [2018-09-30 23:22:38,348 INFO L226 Difference]: Without dead ends: 687 [2018-09-30 23:22:38,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:22:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-30 23:22:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-30 23:22:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-30 23:22:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-30 23:22:38,795 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-30 23:22:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:38,796 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-30 23:22:38,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:22:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-30 23:22:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-30 23:22:38,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:38,799 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-30 23:22:38,800 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:38,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-30 23:22:38,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:38,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:38,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-30 23:22:40,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:40,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:40,435 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:42,208 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-30 23:22:42,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:42,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-30 23:22:42,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:42,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:22:42,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:22:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:22:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:22:42,564 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-30 23:22:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:43,325 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-30 23:22:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:22:43,325 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-30 23:22:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:43,327 INFO L225 Difference]: With dead ends: 701 [2018-09-30 23:22:43,327 INFO L226 Difference]: Without dead ends: 699 [2018-09-30 23:22:43,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:22:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-30 23:22:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-30 23:22:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-30 23:22:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-30 23:22:43,756 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-30 23:22:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:43,757 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-30 23:22:43,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:22:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-30 23:22:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-30 23:22:43,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:43,760 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-30 23:22:43,761 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:43,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-30 23:22:43,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:43,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:43,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:43,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:43,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-30 23:22:45,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:45,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:45,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:47,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-30 23:22:47,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:47,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-30 23:22:47,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:47,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:22:47,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:22:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:22:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:22:47,563 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-30 23:22:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:48,297 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-30 23:22:48,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:22:48,297 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-30 23:22:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:48,300 INFO L225 Difference]: With dead ends: 713 [2018-09-30 23:22:48,300 INFO L226 Difference]: Without dead ends: 711 [2018-09-30 23:22:48,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:22:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-30 23:22:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-30 23:22:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-30 23:22:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-30 23:22:48,757 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-30 23:22:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:48,757 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-30 23:22:48,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:22:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-30 23:22:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-30 23:22:48,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:48,761 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-30 23:22:48,761 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:48,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-30 23:22:48,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:48,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:48,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:48,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:48,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-30 23:22:50,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:50,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:50,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:50,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-30 23:22:51,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:51,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:22:51,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:22:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:22:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:22:51,294 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-30 23:22:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:52,150 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-30 23:22:52,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:22:52,151 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-30 23:22:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:52,153 INFO L225 Difference]: With dead ends: 725 [2018-09-30 23:22:52,153 INFO L226 Difference]: Without dead ends: 723 [2018-09-30 23:22:52,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:22:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-30 23:22:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-30 23:22:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-30 23:22:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-30 23:22:52,641 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-30 23:22:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:52,641 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-30 23:22:52,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:22:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-30 23:22:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-30 23:22:52,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:52,645 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-30 23:22:52,645 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:52,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-30 23:22:52,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:52,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:52,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:52,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:52,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-30 23:22:54,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:54,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:54,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:54,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:54,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:54,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-30 23:22:55,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:55,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:22:55,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:22:55,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:22:55,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:22:55,296 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-30 23:22:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:56,093 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-30 23:22:56,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:22:56,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-30 23:22:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:56,096 INFO L225 Difference]: With dead ends: 737 [2018-09-30 23:22:56,096 INFO L226 Difference]: Without dead ends: 735 [2018-09-30 23:22:56,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:22:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-30 23:22:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-30 23:22:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-30 23:22:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-30 23:22:56,609 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-30 23:22:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:56,609 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-30 23:22:56,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:22:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-30 23:22:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-30 23:22:56,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:56,613 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-30 23:22:56,614 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:56,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-30 23:22:56,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:56,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:56,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:56,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:56,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-30 23:22:58,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:58,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:58,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:00,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-30 23:23:00,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:00,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-30 23:23:00,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:00,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:23:00,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:23:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:23:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:23:00,933 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-30 23:23:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:02,161 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-30 23:23:02,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:23:02,161 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-30 23:23:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:02,165 INFO L225 Difference]: With dead ends: 749 [2018-09-30 23:23:02,165 INFO L226 Difference]: Without dead ends: 747 [2018-09-30 23:23:02,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:23:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-30 23:23:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-30 23:23:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-30 23:23:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-30 23:23:02,771 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-30 23:23:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:02,771 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-30 23:23:02,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:23:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-30 23:23:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-30 23:23:02,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:02,775 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-30 23:23:02,776 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:02,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-30 23:23:02,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:02,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:02,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:02,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:02,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-30 23:23:04,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:04,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:04,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:05,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:05,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:05,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-30 23:23:05,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:05,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:23:05,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:23:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:23:05,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:23:05,475 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-30 23:23:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:06,355 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-30 23:23:06,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:23:06,355 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-30 23:23:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:06,358 INFO L225 Difference]: With dead ends: 761 [2018-09-30 23:23:06,358 INFO L226 Difference]: Without dead ends: 759 [2018-09-30 23:23:06,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:23:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-30 23:23:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-30 23:23:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-30 23:23:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-30 23:23:06,893 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-30 23:23:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:06,894 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-30 23:23:06,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:23:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-30 23:23:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-30 23:23:06,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:06,898 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-30 23:23:06,898 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:06,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-30 23:23:06,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:06,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:06,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:06,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:06,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-30 23:23:08,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:08,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:08,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:11,043 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-30 23:23:11,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:11,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-30 23:23:11,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:11,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:23:11,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:23:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:23:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:23:11,498 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-30 23:23:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:12,412 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-30 23:23:12,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:23:12,412 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-30 23:23:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:12,415 INFO L225 Difference]: With dead ends: 773 [2018-09-30 23:23:12,415 INFO L226 Difference]: Without dead ends: 771 [2018-09-30 23:23:12,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:23:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-30 23:23:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-30 23:23:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-30 23:23:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-30 23:23:12,995 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-30 23:23:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:12,995 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-30 23:23:12,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:23:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-30 23:23:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-30 23:23:12,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:12,999 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-30 23:23:13,000 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:13,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-30 23:23:13,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:13,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:13,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:13,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:13,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-30 23:23:15,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:15,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:15,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:17,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-30 23:23:17,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:17,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-30 23:23:17,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:17,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:23:17,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:23:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:23:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:23:17,675 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-30 23:23:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:18,686 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-30 23:23:18,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:23:18,686 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-30 23:23:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:18,689 INFO L225 Difference]: With dead ends: 785 [2018-09-30 23:23:18,689 INFO L226 Difference]: Without dead ends: 783 [2018-09-30 23:23:18,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:23:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-30 23:23:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-30 23:23:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-30 23:23:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-30 23:23:19,241 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-30 23:23:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:19,242 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-30 23:23:19,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:23:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-30 23:23:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-30 23:23:19,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:19,246 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-30 23:23:19,246 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:19,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-30 23:23:19,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:19,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:19,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:19,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:19,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-30 23:23:21,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:21,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:21,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:21,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-30 23:23:22,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:22,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:23:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:23:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:23:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:23:22,162 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-30 23:23:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:23,135 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-30 23:23:23,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:23:23,136 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-30 23:23:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:23,138 INFO L225 Difference]: With dead ends: 797 [2018-09-30 23:23:23,138 INFO L226 Difference]: Without dead ends: 795 [2018-09-30 23:23:23,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:23:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-30 23:23:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-30 23:23:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-30 23:23:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-30 23:23:23,712 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-30 23:23:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:23,713 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-30 23:23:23,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:23:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-30 23:23:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-30 23:23:23,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:23,717 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-30 23:23:23,717 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:23,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-30 23:23:23,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:23,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:23,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:23,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:23,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-30 23:23:25,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:25,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:25,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:26,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:26,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:26,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-30 23:23:26,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:26,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:23:26,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:23:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:23:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:23:26,711 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-30 23:23:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:27,777 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-09-30 23:23:27,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:23:27,777 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-09-30 23:23:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:27,780 INFO L225 Difference]: With dead ends: 809 [2018-09-30 23:23:27,780 INFO L226 Difference]: Without dead ends: 807 [2018-09-30 23:23:27,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:23:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-09-30 23:23:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-09-30 23:23:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-09-30 23:23:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-09-30 23:23:28,429 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-09-30 23:23:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:28,429 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-09-30 23:23:28,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:23:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-09-30 23:23:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-30 23:23:28,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:28,434 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-09-30 23:23:28,434 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:28,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:28,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-09-30 23:23:28,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:28,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:28,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:28,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:28,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-30 23:23:30,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:30,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:30,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:33,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-09-30 23:23:33,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:33,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-30 23:23:33,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:33,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:23:33,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:23:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:23:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:23:33,610 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-09-30 23:23:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:34,666 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-09-30 23:23:34,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:23:34,667 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-09-30 23:23:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:34,669 INFO L225 Difference]: With dead ends: 821 [2018-09-30 23:23:34,669 INFO L226 Difference]: Without dead ends: 819 [2018-09-30 23:23:34,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:23:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-09-30 23:23:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-09-30 23:23:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-09-30 23:23:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-09-30 23:23:35,362 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-09-30 23:23:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:35,362 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-09-30 23:23:35,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:23:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-09-30 23:23:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-30 23:23:35,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:35,368 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-09-30 23:23:35,368 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:35,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-09-30 23:23:35,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:35,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:35,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:35,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:35,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-30 23:23:37,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:37,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:37,899 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:38,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:38,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:38,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-30 23:23:38,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:38,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:23:38,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:23:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:23:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:23:38,864 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-09-30 23:23:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:40,015 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-09-30 23:23:40,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:23:40,016 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-09-30 23:23:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:40,019 INFO L225 Difference]: With dead ends: 833 [2018-09-30 23:23:40,019 INFO L226 Difference]: Without dead ends: 831 [2018-09-30 23:23:40,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:23:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-09-30 23:23:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-09-30 23:23:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-30 23:23:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-09-30 23:23:40,720 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-09-30 23:23:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:40,721 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-09-30 23:23:40,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:23:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-09-30 23:23:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-09-30 23:23:40,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:40,726 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-09-30 23:23:40,726 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:40,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-09-30 23:23:40,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:40,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:40,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:40,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:40,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-30 23:23:43,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:43,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:43,333 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:45,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-09-30 23:23:45,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:45,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-30 23:23:46,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:46,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:23:46,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:23:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:23:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:23:46,380 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-09-30 23:23:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:47,479 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-09-30 23:23:47,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:23:47,480 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-09-30 23:23:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:47,483 INFO L225 Difference]: With dead ends: 845 [2018-09-30 23:23:47,483 INFO L226 Difference]: Without dead ends: 843 [2018-09-30 23:23:47,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:23:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-09-30 23:23:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-09-30 23:23:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-09-30 23:23:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-09-30 23:23:48,139 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-09-30 23:23:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:48,139 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-09-30 23:23:48,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:23:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-09-30 23:23:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-09-30 23:23:48,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:48,144 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-09-30 23:23:48,144 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:48,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-09-30 23:23:48,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:48,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:48,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:48,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:48,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-30 23:23:50,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:50,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:50,575 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:53,223 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-09-30 23:23:53,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:53,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-30 23:23:53,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:53,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:23:53,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:23:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:23:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:23:53,831 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-09-30 23:23:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:54,980 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-09-30 23:23:54,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:23:54,981 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-09-30 23:23:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:54,987 INFO L225 Difference]: With dead ends: 857 [2018-09-30 23:23:54,988 INFO L226 Difference]: Without dead ends: 855 [2018-09-30 23:23:54,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:23:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-09-30 23:23:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-09-30 23:23:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-09-30 23:23:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-09-30 23:23:55,703 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-09-30 23:23:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:55,704 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-09-30 23:23:55,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:23:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-09-30 23:23:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-30 23:23:55,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:55,709 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-09-30 23:23:55,709 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:55,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-09-30 23:23:55,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:55,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:55,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:55,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-30 23:23:58,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:58,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:58,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:58,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-30 23:23:59,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:59,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:23:59,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:23:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:23:59,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:23:59,507 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-09-30 23:24:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:00,775 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-09-30 23:24:00,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:24:00,776 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-09-30 23:24:00,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:00,778 INFO L225 Difference]: With dead ends: 869 [2018-09-30 23:24:00,778 INFO L226 Difference]: Without dead ends: 867 [2018-09-30 23:24:00,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:24:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-09-30 23:24:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-09-30 23:24:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-09-30 23:24:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-09-30 23:24:01,474 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-09-30 23:24:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:01,475 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-09-30 23:24:01,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:24:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-09-30 23:24:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-09-30 23:24:01,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:01,480 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-09-30 23:24:01,480 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:01,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:01,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-09-30 23:24:01,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:01,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:01,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:01,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-30 23:24:04,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:04,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:04,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:04,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:04,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:04,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-30 23:24:05,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:05,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:24:05,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:24:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:24:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:24:05,391 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-09-30 23:24:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:06,624 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-09-30 23:24:06,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:24:06,625 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-09-30 23:24:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:06,626 INFO L225 Difference]: With dead ends: 881 [2018-09-30 23:24:06,626 INFO L226 Difference]: Without dead ends: 879 [2018-09-30 23:24:06,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:24:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-09-30 23:24:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-09-30 23:24:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-09-30 23:24:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-09-30 23:24:07,428 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-09-30 23:24:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:07,428 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-09-30 23:24:07,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:24:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-09-30 23:24:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-30 23:24:07,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:07,433 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-09-30 23:24:07,433 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:07,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:07,434 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-09-30 23:24:07,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:07,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:07,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:07,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:07,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-30 23:24:10,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:10,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:10,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:12,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-09-30 23:24:12,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:12,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-30 23:24:13,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:13,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:24:13,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:24:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:24:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:24:13,509 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-09-30 23:24:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:14,793 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-09-30 23:24:14,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:24:14,793 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-09-30 23:24:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:14,795 INFO L225 Difference]: With dead ends: 893 [2018-09-30 23:24:14,795 INFO L226 Difference]: Without dead ends: 891 [2018-09-30 23:24:14,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:24:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-09-30 23:24:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-09-30 23:24:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-09-30 23:24:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-09-30 23:24:15,622 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-09-30 23:24:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:15,622 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-09-30 23:24:15,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:24:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-09-30 23:24:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-09-30 23:24:15,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:15,628 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-09-30 23:24:15,629 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:15,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-09-30 23:24:15,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:15,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:15,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:15,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-30 23:24:18,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:18,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:18,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:19,029 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:19,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:19,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-30 23:24:19,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:19,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:24:19,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:24:19,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:24:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:24:19,603 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-09-30 23:24:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:20,863 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-09-30 23:24:20,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:24:20,863 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-09-30 23:24:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:20,865 INFO L225 Difference]: With dead ends: 905 [2018-09-30 23:24:20,865 INFO L226 Difference]: Without dead ends: 903 [2018-09-30 23:24:20,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:24:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-09-30 23:24:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-09-30 23:24:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-09-30 23:24:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-09-30 23:24:21,632 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-09-30 23:24:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:21,633 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-09-30 23:24:21,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:24:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-09-30 23:24:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-09-30 23:24:21,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:21,638 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-09-30 23:24:21,638 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:21,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:21,639 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-09-30 23:24:21,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:21,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:21,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:21,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-30 23:24:24,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:24,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:24,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:27,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-09-30 23:24:27,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:27,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-30 23:24:28,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:28,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:24:28,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:24:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:24:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:24:28,350 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-09-30 23:24:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:29,732 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-09-30 23:24:29,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:24:29,733 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-09-30 23:24:29,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:29,734 INFO L225 Difference]: With dead ends: 917 [2018-09-30 23:24:29,734 INFO L226 Difference]: Without dead ends: 915 [2018-09-30 23:24:29,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:24:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-30 23:24:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-09-30 23:24:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-09-30 23:24:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-09-30 23:24:30,586 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-09-30 23:24:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:30,587 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-09-30 23:24:30,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:24:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-09-30 23:24:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-09-30 23:24:30,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:30,594 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-09-30 23:24:30,594 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:30,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-09-30 23:24:30,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:30,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:30,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:30,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:30,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-30 23:24:33,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:33,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:33,868 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:36,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-09-30 23:24:36,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:37,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-30 23:24:37,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:37,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:24:37,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:24:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:24:37,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:24:37,643 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-09-30 23:24:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:39,001 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-09-30 23:24:39,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:24:39,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-09-30 23:24:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:39,003 INFO L225 Difference]: With dead ends: 929 [2018-09-30 23:24:39,003 INFO L226 Difference]: Without dead ends: 927 [2018-09-30 23:24:39,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:24:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-09-30 23:24:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-09-30 23:24:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-09-30 23:24:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-09-30 23:24:39,892 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-09-30 23:24:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:39,892 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-09-30 23:24:39,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:24:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-09-30 23:24:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-09-30 23:24:39,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:39,899 INFO L375 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-09-30 23:24:39,899 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:39,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 79 times [2018-09-30 23:24:39,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:39,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:39,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:39,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-09-30 23:24:42,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:42,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:42,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:43,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-09-30 23:24:43,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:43,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:24:43,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:24:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:24:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:24:43,870 INFO L87 Difference]: Start difference. First operand 916 states and 992 transitions. Second operand 79 states. [2018-09-30 23:24:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:45,263 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2018-09-30 23:24:45,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:24:45,263 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 915 [2018-09-30 23:24:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:45,265 INFO L225 Difference]: With dead ends: 941 [2018-09-30 23:24:45,265 INFO L226 Difference]: Without dead ends: 939 [2018-09-30 23:24:45,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:24:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2018-09-30 23:24:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 928. [2018-09-30 23:24:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2018-09-30 23:24:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1005 transitions. [2018-09-30 23:24:46,149 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1005 transitions. Word has length 915 [2018-09-30 23:24:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:46,150 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 1005 transitions. [2018-09-30 23:24:46,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:24:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1005 transitions. [2018-09-30 23:24:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-09-30 23:24:46,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:46,155 INFO L375 BasicCegarLoop]: trace histogram [770, 77, 77, 1, 1, 1] [2018-09-30 23:24:46,155 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:46,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:46,156 INFO L82 PathProgramCache]: Analyzing trace with hash 345957445, now seen corresponding path program 80 times [2018-09-30 23:24:46,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:46,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:46,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:46,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 361284 backedges. 0 proven. 357049 refuted. 0 times theorem prover too weak. 4235 trivial. 0 not checked. [2018-09-30 23:24:49,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:49,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:49,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:49,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:49,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:49,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 361284 backedges. 0 proven. 357049 refuted. 0 times theorem prover too weak. 4235 trivial. 0 not checked. [2018-09-30 23:24:50,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:50,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:24:50,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:24:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:24:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:24:50,528 INFO L87 Difference]: Start difference. First operand 928 states and 1005 transitions. Second operand 80 states. [2018-09-30 23:24:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:51,961 INFO L93 Difference]: Finished difference Result 953 states and 1032 transitions. [2018-09-30 23:24:51,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:24:51,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 927 [2018-09-30 23:24:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:51,963 INFO L225 Difference]: With dead ends: 953 [2018-09-30 23:24:51,963 INFO L226 Difference]: Without dead ends: 951 [2018-09-30 23:24:51,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 927 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:24:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2018-09-30 23:24:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 940. [2018-09-30 23:24:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2018-09-30 23:24:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1018 transitions. [2018-09-30 23:24:52,902 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1018 transitions. Word has length 927 [2018-09-30 23:24:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:52,903 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 1018 transitions. [2018-09-30 23:24:52,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:24:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1018 transitions. [2018-09-30 23:24:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2018-09-30 23:24:52,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:52,909 INFO L375 BasicCegarLoop]: trace histogram [780, 78, 78, 1, 1, 1] [2018-09-30 23:24:52,909 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:52,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:52,909 INFO L82 PathProgramCache]: Analyzing trace with hash -456595313, now seen corresponding path program 81 times [2018-09-30 23:24:52,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:52,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:52,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:52,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:52,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 370734 backedges. 0 proven. 366444 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-30 23:24:56,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:56,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:56,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:59,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 469 check-sat command(s) [2018-09-30 23:24:59,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:59,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 370734 backedges. 0 proven. 366444 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-30 23:25:00,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:00,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:25:00,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:25:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:25:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:25:00,324 INFO L87 Difference]: Start difference. First operand 940 states and 1018 transitions. Second operand 81 states. [2018-09-30 23:25:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:01,766 INFO L93 Difference]: Finished difference Result 965 states and 1045 transitions. [2018-09-30 23:25:01,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:25:01,767 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 939 [2018-09-30 23:25:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:01,768 INFO L225 Difference]: With dead ends: 965 [2018-09-30 23:25:01,768 INFO L226 Difference]: Without dead ends: 963 [2018-09-30 23:25:01,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 939 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:25:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2018-09-30 23:25:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 952. [2018-09-30 23:25:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-09-30 23:25:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1031 transitions. [2018-09-30 23:25:02,670 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1031 transitions. Word has length 939 [2018-09-30 23:25:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:02,670 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 1031 transitions. [2018-09-30 23:25:02,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:25:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1031 transitions. [2018-09-30 23:25:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2018-09-30 23:25:02,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:02,676 INFO L375 BasicCegarLoop]: trace histogram [790, 79, 79, 1, 1, 1] [2018-09-30 23:25:02,676 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:02,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1007890983, now seen corresponding path program 82 times [2018-09-30 23:25:02,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:02,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:02,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:02,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 380306 backedges. 0 proven. 375961 refuted. 0 times theorem prover too weak. 4345 trivial. 0 not checked. [2018-09-30 23:25:06,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:06,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:06,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:06,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:06,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:06,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 380306 backedges. 0 proven. 375961 refuted. 0 times theorem prover too weak. 4345 trivial. 0 not checked. [2018-09-30 23:25:07,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:07,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:25:07,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:25:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:25:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:25:07,275 INFO L87 Difference]: Start difference. First operand 952 states and 1031 transitions. Second operand 82 states. [2018-09-30 23:25:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:08,829 INFO L93 Difference]: Finished difference Result 977 states and 1058 transitions. [2018-09-30 23:25:08,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:25:08,829 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 951 [2018-09-30 23:25:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:08,832 INFO L225 Difference]: With dead ends: 977 [2018-09-30 23:25:08,832 INFO L226 Difference]: Without dead ends: 975 [2018-09-30 23:25:08,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 951 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:25:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2018-09-30 23:25:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 964. [2018-09-30 23:25:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2018-09-30 23:25:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1044 transitions. [2018-09-30 23:25:09,885 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1044 transitions. Word has length 951 [2018-09-30 23:25:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:09,886 INFO L480 AbstractCegarLoop]: Abstraction has 964 states and 1044 transitions. [2018-09-30 23:25:09,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:25:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1044 transitions. [2018-09-30 23:25:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-09-30 23:25:09,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:09,893 INFO L375 BasicCegarLoop]: trace histogram [800, 80, 80, 1, 1, 1] [2018-09-30 23:25:09,893 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:09,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash 759239715, now seen corresponding path program 83 times [2018-09-30 23:25:09,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:09,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:09,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:09,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:09,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 390000 backedges. 0 proven. 385600 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2018-09-30 23:25:13,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:13,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:13,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:16,646 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 481 check-sat command(s) [2018-09-30 23:25:16,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:16,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 390000 backedges. 0 proven. 385600 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2018-09-30 23:25:17,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:17,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:25:17,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:25:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:25:17,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:25:17,333 INFO L87 Difference]: Start difference. First operand 964 states and 1044 transitions. Second operand 83 states. [2018-09-30 23:25:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:18,965 INFO L93 Difference]: Finished difference Result 989 states and 1071 transitions. [2018-09-30 23:25:18,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:25:18,967 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 963 [2018-09-30 23:25:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:18,969 INFO L225 Difference]: With dead ends: 989 [2018-09-30 23:25:18,969 INFO L226 Difference]: Without dead ends: 987 [2018-09-30 23:25:18,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 963 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:25:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2018-09-30 23:25:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 976. [2018-09-30 23:25:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2018-09-30 23:25:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1057 transitions. [2018-09-30 23:25:20,050 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1057 transitions. Word has length 963 [2018-09-30 23:25:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:20,050 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 1057 transitions. [2018-09-30 23:25:20,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:25:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1057 transitions. [2018-09-30 23:25:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2018-09-30 23:25:20,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:20,057 INFO L375 BasicCegarLoop]: trace histogram [810, 81, 81, 1, 1, 1] [2018-09-30 23:25:20,057 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:20,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash -29607059, now seen corresponding path program 84 times [2018-09-30 23:25:20,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:20,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:20,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:20,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:20,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 399816 backedges. 0 proven. 395361 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2018-09-30 23:25:23,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:23,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:23,270 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:26,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 483 check-sat command(s) [2018-09-30 23:25:26,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:27,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 399816 backedges. 0 proven. 395361 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2018-09-30 23:25:27,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:27,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:25:27,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:25:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:25:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:25:27,670 INFO L87 Difference]: Start difference. First operand 976 states and 1057 transitions. Second operand 84 states. [2018-09-30 23:25:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:29,361 INFO L93 Difference]: Finished difference Result 1001 states and 1084 transitions. [2018-09-30 23:25:29,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:25:29,361 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 975 [2018-09-30 23:25:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:29,363 INFO L225 Difference]: With dead ends: 1001 [2018-09-30 23:25:29,363 INFO L226 Difference]: Without dead ends: 999 [2018-09-30 23:25:29,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 975 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:25:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2018-09-30 23:25:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 988. [2018-09-30 23:25:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2018-09-30 23:25:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1070 transitions. [2018-09-30 23:25:30,355 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1070 transitions. Word has length 975 [2018-09-30 23:25:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:30,356 INFO L480 AbstractCegarLoop]: Abstraction has 988 states and 1070 transitions. [2018-09-30 23:25:30,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:25:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1070 transitions. [2018-09-30 23:25:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2018-09-30 23:25:30,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:30,363 INFO L375 BasicCegarLoop]: trace histogram [820, 82, 82, 1, 1, 1] [2018-09-30 23:25:30,363 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:30,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash 378848183, now seen corresponding path program 85 times [2018-09-30 23:25:30,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:30,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:30,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:30,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:30,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 409754 backedges. 0 proven. 405244 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2018-09-30 23:25:33,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:33,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:33,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:34,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 409754 backedges. 0 proven. 405244 refuted. 0 times theorem prover too weak. 4510 trivial. 0 not checked. [2018-09-30 23:25:34,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:34,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:25:34,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:25:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:25:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:25:35,000 INFO L87 Difference]: Start difference. First operand 988 states and 1070 transitions. Second operand 85 states. [2018-09-30 23:25:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:36,631 INFO L93 Difference]: Finished difference Result 1013 states and 1097 transitions. [2018-09-30 23:25:36,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:25:36,631 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 987 [2018-09-30 23:25:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:36,634 INFO L225 Difference]: With dead ends: 1013 [2018-09-30 23:25:36,634 INFO L226 Difference]: Without dead ends: 1011 [2018-09-30 23:25:36,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 987 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:25:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2018-09-30 23:25:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1000. [2018-09-30 23:25:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2018-09-30 23:25:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1083 transitions. [2018-09-30 23:25:37,852 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1083 transitions. Word has length 987 [2018-09-30 23:25:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:37,853 INFO L480 AbstractCegarLoop]: Abstraction has 1000 states and 1083 transitions. [2018-09-30 23:25:37,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:25:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1083 transitions. [2018-09-30 23:25:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2018-09-30 23:25:37,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:37,860 INFO L375 BasicCegarLoop]: trace histogram [830, 83, 83, 1, 1, 1] [2018-09-30 23:25:37,860 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:37,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash -129946367, now seen corresponding path program 86 times [2018-09-30 23:25:37,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:37,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:37,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:37,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:37,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 419814 backedges. 0 proven. 415249 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2018-09-30 23:25:41,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:41,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:41,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:42,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:42,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:42,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 419814 backedges. 0 proven. 415249 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2018-09-30 23:25:42,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:42,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:25:42,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:25:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:25:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:25:42,715 INFO L87 Difference]: Start difference. First operand 1000 states and 1083 transitions. Second operand 86 states. [2018-09-30 23:25:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:44,341 INFO L93 Difference]: Finished difference Result 1025 states and 1110 transitions. [2018-09-30 23:25:44,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:25:44,342 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 999 [2018-09-30 23:25:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:44,343 INFO L225 Difference]: With dead ends: 1025 [2018-09-30 23:25:44,343 INFO L226 Difference]: Without dead ends: 1023 [2018-09-30 23:25:44,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:25:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-30 23:25:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1012. [2018-09-30 23:25:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2018-09-30 23:25:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1096 transitions. [2018-09-30 23:25:45,375 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1096 transitions. Word has length 999 [2018-09-30 23:25:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:45,375 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 1096 transitions. [2018-09-30 23:25:45,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:25:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1096 transitions. [2018-09-30 23:25:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2018-09-30 23:25:45,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:45,382 INFO L375 BasicCegarLoop]: trace histogram [840, 84, 84, 1, 1, 1] [2018-09-30 23:25:45,382 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:45,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1735915339, now seen corresponding path program 87 times [2018-09-30 23:25:45,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:45,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:45,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:45,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:45,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 429996 backedges. 0 proven. 425376 refuted. 0 times theorem prover too weak. 4620 trivial. 0 not checked. [2018-09-30 23:25:48,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:48,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:48,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:52,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 505 check-sat command(s) [2018-09-30 23:25:52,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:52,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 429996 backedges. 0 proven. 425376 refuted. 0 times theorem prover too weak. 4620 trivial. 0 not checked. [2018-09-30 23:25:53,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:53,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:25:53,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:25:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:25:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:25:53,634 INFO L87 Difference]: Start difference. First operand 1012 states and 1096 transitions. Second operand 87 states. [2018-09-30 23:25:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:55,331 INFO L93 Difference]: Finished difference Result 1037 states and 1123 transitions. [2018-09-30 23:25:55,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:25:55,332 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 1011 [2018-09-30 23:25:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:55,333 INFO L225 Difference]: With dead ends: 1037 [2018-09-30 23:25:55,333 INFO L226 Difference]: Without dead ends: 1035 [2018-09-30 23:25:55,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:25:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2018-09-30 23:25:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1024. [2018-09-30 23:25:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-09-30 23:25:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1109 transitions. [2018-09-30 23:25:56,551 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1109 transitions. Word has length 1011 [2018-09-30 23:25:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:56,551 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1109 transitions. [2018-09-30 23:25:56,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:25:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1109 transitions. [2018-09-30 23:25:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2018-09-30 23:25:56,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:56,558 INFO L375 BasicCegarLoop]: trace histogram [850, 85, 85, 1, 1, 1] [2018-09-30 23:25:56,558 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:56,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:56,558 INFO L82 PathProgramCache]: Analyzing trace with hash 179282581, now seen corresponding path program 88 times [2018-09-30 23:25:56,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:56,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:56,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:56,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:56,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 440300 backedges. 0 proven. 435625 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2018-09-30 23:26:00,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:00,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:00,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:00,667 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:00,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:00,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 440300 backedges. 0 proven. 435625 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2018-09-30 23:26:01,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:01,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:26:01,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:26:01,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:26:01,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:26:01,467 INFO L87 Difference]: Start difference. First operand 1024 states and 1109 transitions. Second operand 88 states. [2018-09-30 23:26:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:03,344 INFO L93 Difference]: Finished difference Result 1049 states and 1136 transitions. [2018-09-30 23:26:03,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:26:03,345 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1023 [2018-09-30 23:26:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:03,346 INFO L225 Difference]: With dead ends: 1049 [2018-09-30 23:26:03,346 INFO L226 Difference]: Without dead ends: 1047 [2018-09-30 23:26:03,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:26:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2018-09-30 23:26:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1036. [2018-09-30 23:26:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2018-09-30 23:26:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1122 transitions. [2018-09-30 23:26:04,513 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1122 transitions. Word has length 1023 [2018-09-30 23:26:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:04,513 INFO L480 AbstractCegarLoop]: Abstraction has 1036 states and 1122 transitions. [2018-09-30 23:26:04,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:26:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1122 transitions. [2018-09-30 23:26:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2018-09-30 23:26:04,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:04,521 INFO L375 BasicCegarLoop]: trace histogram [860, 86, 86, 1, 1, 1] [2018-09-30 23:26:04,521 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:04,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:04,521 INFO L82 PathProgramCache]: Analyzing trace with hash 178171615, now seen corresponding path program 89 times [2018-09-30 23:26:04,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:04,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:04,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:04,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:04,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 450726 backedges. 0 proven. 445996 refuted. 0 times theorem prover too weak. 4730 trivial. 0 not checked. [2018-09-30 23:26:08,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:08,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:08,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:12,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 517 check-sat command(s) [2018-09-30 23:26:12,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:12,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 450726 backedges. 0 proven. 445996 refuted. 0 times theorem prover too weak. 4730 trivial. 0 not checked. [2018-09-30 23:26:13,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:13,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:26:13,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:26:13,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:26:13,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:26:13,566 INFO L87 Difference]: Start difference. First operand 1036 states and 1122 transitions. Second operand 89 states. [2018-09-30 23:26:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:15,519 INFO L93 Difference]: Finished difference Result 1061 states and 1149 transitions. [2018-09-30 23:26:15,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:26:15,520 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 1035 [2018-09-30 23:26:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:15,521 INFO L225 Difference]: With dead ends: 1061 [2018-09-30 23:26:15,521 INFO L226 Difference]: Without dead ends: 1059 [2018-09-30 23:26:15,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:26:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2018-09-30 23:26:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1048. [2018-09-30 23:26:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-09-30 23:26:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1135 transitions. [2018-09-30 23:26:16,721 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1135 transitions. Word has length 1035 [2018-09-30 23:26:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:16,722 INFO L480 AbstractCegarLoop]: Abstraction has 1048 states and 1135 transitions. [2018-09-30 23:26:16,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:26:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1135 transitions. [2018-09-30 23:26:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2018-09-30 23:26:16,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:16,729 INFO L375 BasicCegarLoop]: trace histogram [870, 87, 87, 1, 1, 1] [2018-09-30 23:26:16,730 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:16,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:16,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1304716247, now seen corresponding path program 90 times [2018-09-30 23:26:16,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:16,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:16,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 461274 backedges. 0 proven. 456489 refuted. 0 times theorem prover too weak. 4785 trivial. 0 not checked. [2018-09-30 23:26:20,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:20,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:20,472 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:24,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 518 check-sat command(s) [2018-09-30 23:26:24,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:24,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 461274 backedges. 0 proven. 456489 refuted. 0 times theorem prover too weak. 4785 trivial. 0 not checked. [2018-09-30 23:26:25,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:25,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:26:25,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:26:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:26:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:26:25,609 INFO L87 Difference]: Start difference. First operand 1048 states and 1135 transitions. Second operand 90 states. [2018-09-30 23:26:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:27,463 INFO L93 Difference]: Finished difference Result 1073 states and 1162 transitions. [2018-09-30 23:26:27,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:26:27,464 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 1047 [2018-09-30 23:26:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:27,465 INFO L225 Difference]: With dead ends: 1073 [2018-09-30 23:26:27,465 INFO L226 Difference]: Without dead ends: 1071 [2018-09-30 23:26:27,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1135 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:26:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2018-09-30 23:26:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1060. [2018-09-30 23:26:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1060 states. [2018-09-30 23:26:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1148 transitions. [2018-09-30 23:26:28,800 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1148 transitions. Word has length 1047 [2018-09-30 23:26:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:28,800 INFO L480 AbstractCegarLoop]: Abstraction has 1060 states and 1148 transitions. [2018-09-30 23:26:28,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:26:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1148 transitions. [2018-09-30 23:26:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2018-09-30 23:26:28,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:28,808 INFO L375 BasicCegarLoop]: trace histogram [880, 88, 88, 1, 1, 1] [2018-09-30 23:26:28,808 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:28,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash 247261811, now seen corresponding path program 91 times [2018-09-30 23:26:28,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:28,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:28,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:28,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:28,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 471944 backedges. 0 proven. 467104 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-09-30 23:26:32,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:32,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:32,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:33,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 471944 backedges. 0 proven. 467104 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-09-30 23:26:34,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:34,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:26:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:26:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:26:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:26:34,279 INFO L87 Difference]: Start difference. First operand 1060 states and 1148 transitions. Second operand 91 states. [2018-09-30 23:26:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:36,040 INFO L93 Difference]: Finished difference Result 1085 states and 1175 transitions. [2018-09-30 23:26:36,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:26:36,041 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1059 [2018-09-30 23:26:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:36,042 INFO L225 Difference]: With dead ends: 1085 [2018-09-30 23:26:36,042 INFO L226 Difference]: Without dead ends: 1083 [2018-09-30 23:26:36,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1059 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:26:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2018-09-30 23:26:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1072. [2018-09-30 23:26:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1072 states. [2018-09-30 23:26:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1161 transitions. [2018-09-30 23:26:37,236 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1161 transitions. Word has length 1059 [2018-09-30 23:26:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:37,236 INFO L480 AbstractCegarLoop]: Abstraction has 1072 states and 1161 transitions. [2018-09-30 23:26:37,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:26:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1161 transitions. [2018-09-30 23:26:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2018-09-30 23:26:37,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:37,243 INFO L375 BasicCegarLoop]: trace histogram [890, 89, 89, 1, 1, 1] [2018-09-30 23:26:37,243 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:37,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1885791811, now seen corresponding path program 92 times [2018-09-30 23:26:37,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:37,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:37,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:37,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:37,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 482736 backedges. 0 proven. 477841 refuted. 0 times theorem prover too weak. 4895 trivial. 0 not checked. [2018-09-30 23:26:42,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:42,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:42,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:42,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:42,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:42,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 482736 backedges. 0 proven. 477841 refuted. 0 times theorem prover too weak. 4895 trivial. 0 not checked. [2018-09-30 23:26:43,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:43,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:26:43,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:26:43,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:26:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:26:43,555 INFO L87 Difference]: Start difference. First operand 1072 states and 1161 transitions. Second operand 92 states. [2018-09-30 23:26:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:45,472 INFO L93 Difference]: Finished difference Result 1097 states and 1188 transitions. [2018-09-30 23:26:45,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:26:45,473 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 1071 [2018-09-30 23:26:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:45,474 INFO L225 Difference]: With dead ends: 1097 [2018-09-30 23:26:45,474 INFO L226 Difference]: Without dead ends: 1095 [2018-09-30 23:26:45,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 1071 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:26:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2018-09-30 23:26:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1084. [2018-09-30 23:26:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2018-09-30 23:26:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1174 transitions. [2018-09-30 23:26:46,755 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1174 transitions. Word has length 1071 [2018-09-30 23:26:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:46,756 INFO L480 AbstractCegarLoop]: Abstraction has 1084 states and 1174 transitions. [2018-09-30 23:26:46,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:26:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1174 transitions. [2018-09-30 23:26:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2018-09-30 23:26:46,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:46,763 INFO L375 BasicCegarLoop]: trace histogram [900, 90, 90, 1, 1, 1] [2018-09-30 23:26:46,763 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:46,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1501124089, now seen corresponding path program 93 times [2018-09-30 23:26:46,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:46,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:46,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 493650 backedges. 0 proven. 488700 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2018-09-30 23:26:50,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:50,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:50,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:55,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 541 check-sat command(s) [2018-09-30 23:26:55,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:55,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 493650 backedges. 0 proven. 488700 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2018-09-30 23:26:56,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:56,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:26:56,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:26:56,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:26:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:26:56,156 INFO L87 Difference]: Start difference. First operand 1084 states and 1174 transitions. Second operand 93 states. [2018-09-30 23:26:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:58,086 INFO L93 Difference]: Finished difference Result 1109 states and 1201 transitions. [2018-09-30 23:26:58,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:26:58,087 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1083 [2018-09-30 23:26:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:58,088 INFO L225 Difference]: With dead ends: 1109 [2018-09-30 23:26:58,088 INFO L226 Difference]: Without dead ends: 1107 [2018-09-30 23:26:58,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1083 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:26:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2018-09-30 23:26:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1096. [2018-09-30 23:26:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1096 states. [2018-09-30 23:26:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1187 transitions. [2018-09-30 23:26:59,387 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1187 transitions. Word has length 1083 [2018-09-30 23:26:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:59,388 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 1187 transitions. [2018-09-30 23:26:59,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:26:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1187 transitions. [2018-09-30 23:26:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2018-09-30 23:26:59,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:59,395 INFO L375 BasicCegarLoop]: trace histogram [910, 91, 91, 1, 1, 1] [2018-09-30 23:26:59,396 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:59,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:59,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1736186705, now seen corresponding path program 94 times [2018-09-30 23:26:59,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:59,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:59,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:59,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:59,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 504686 backedges. 0 proven. 499681 refuted. 0 times theorem prover too weak. 5005 trivial. 0 not checked. [2018-09-30 23:27:03,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:03,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:03,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:04,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:04,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:04,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 504686 backedges. 0 proven. 499681 refuted. 0 times theorem prover too weak. 5005 trivial. 0 not checked. [2018-09-30 23:27:05,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:05,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:27:05,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:27:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:27:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:27:05,164 INFO L87 Difference]: Start difference. First operand 1096 states and 1187 transitions. Second operand 94 states. [2018-09-30 23:27:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:07,228 INFO L93 Difference]: Finished difference Result 1121 states and 1214 transitions. [2018-09-30 23:27:07,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:27:07,228 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1095 [2018-09-30 23:27:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:07,230 INFO L225 Difference]: With dead ends: 1121 [2018-09-30 23:27:07,230 INFO L226 Difference]: Without dead ends: 1119 [2018-09-30 23:27:07,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1187 GetRequests, 1095 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:27:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2018-09-30 23:27:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1108. [2018-09-30 23:27:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2018-09-30 23:27:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1200 transitions. [2018-09-30 23:27:08,605 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1200 transitions. Word has length 1095 [2018-09-30 23:27:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:08,606 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1200 transitions. [2018-09-30 23:27:08,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:27:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1200 transitions. [2018-09-30 23:27:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2018-09-30 23:27:08,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:08,613 INFO L375 BasicCegarLoop]: trace histogram [920, 92, 92, 1, 1, 1] [2018-09-30 23:27:08,614 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:08,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 682618267, now seen corresponding path program 95 times [2018-09-30 23:27:08,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:08,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:08,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 515844 backedges. 0 proven. 510784 refuted. 0 times theorem prover too weak. 5060 trivial. 0 not checked. [2018-09-30 23:27:12,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:12,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:12,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:17,718 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 553 check-sat command(s) [2018-09-30 23:27:17,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:17,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 515844 backedges. 0 proven. 510784 refuted. 0 times theorem prover too weak. 5060 trivial. 0 not checked. [2018-09-30 23:27:18,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:18,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:27:18,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:27:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:27:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:27:18,642 INFO L87 Difference]: Start difference. First operand 1108 states and 1200 transitions. Second operand 95 states. [2018-09-30 23:27:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:20,746 INFO L93 Difference]: Finished difference Result 1133 states and 1227 transitions. [2018-09-30 23:27:20,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:27:20,746 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 1107 [2018-09-30 23:27:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:20,748 INFO L225 Difference]: With dead ends: 1133 [2018-09-30 23:27:20,748 INFO L226 Difference]: Without dead ends: 1131 [2018-09-30 23:27:20,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:27:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2018-09-30 23:27:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1120. [2018-09-30 23:27:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2018-09-30 23:27:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1213 transitions. [2018-09-30 23:27:22,099 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1213 transitions. Word has length 1107 [2018-09-30 23:27:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:22,099 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 1213 transitions. [2018-09-30 23:27:22,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:27:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1213 transitions. [2018-09-30 23:27:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2018-09-30 23:27:22,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:22,107 INFO L375 BasicCegarLoop]: trace histogram [930, 93, 93, 1, 1, 1] [2018-09-30 23:27:22,107 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:22,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:22,107 INFO L82 PathProgramCache]: Analyzing trace with hash 580428005, now seen corresponding path program 96 times [2018-09-30 23:27:22,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:22,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:22,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:22,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:22,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 527124 backedges. 0 proven. 522009 refuted. 0 times theorem prover too weak. 5115 trivial. 0 not checked. [2018-09-30 23:27:26,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:26,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:26,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:31,369 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 555 check-sat command(s) [2018-09-30 23:27:31,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:31,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 527124 backedges. 0 proven. 522009 refuted. 0 times theorem prover too weak. 5115 trivial. 0 not checked. [2018-09-30 23:27:32,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:32,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:27:32,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:27:32,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:27:32,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:27:32,230 INFO L87 Difference]: Start difference. First operand 1120 states and 1213 transitions. Second operand 96 states. [2018-09-30 23:27:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:34,380 INFO L93 Difference]: Finished difference Result 1145 states and 1240 transitions. [2018-09-30 23:27:34,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:27:34,380 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 1119 [2018-09-30 23:27:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:34,381 INFO L225 Difference]: With dead ends: 1145 [2018-09-30 23:27:34,381 INFO L226 Difference]: Without dead ends: 1143 [2018-09-30 23:27:34,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1213 GetRequests, 1119 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:27:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-09-30 23:27:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1132. [2018-09-30 23:27:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2018-09-30 23:27:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1226 transitions. [2018-09-30 23:27:35,859 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1226 transitions. Word has length 1119 [2018-09-30 23:27:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:35,860 INFO L480 AbstractCegarLoop]: Abstraction has 1132 states and 1226 transitions. [2018-09-30 23:27:35,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:27:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1226 transitions. [2018-09-30 23:27:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2018-09-30 23:27:35,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:35,868 INFO L375 BasicCegarLoop]: trace histogram [940, 94, 94, 1, 1, 1] [2018-09-30 23:27:35,868 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:35,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash 267171119, now seen corresponding path program 97 times [2018-09-30 23:27:35,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:35,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:35,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:35,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:35,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 538526 backedges. 0 proven. 533356 refuted. 0 times theorem prover too weak. 5170 trivial. 0 not checked. [2018-09-30 23:27:40,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:40,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:40,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:41,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 538526 backedges. 0 proven. 533356 refuted. 0 times theorem prover too weak. 5170 trivial. 0 not checked. [2018-09-30 23:27:41,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:41,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:27:41,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:27:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:27:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:27:41,978 INFO L87 Difference]: Start difference. First operand 1132 states and 1226 transitions. Second operand 97 states. [2018-09-30 23:27:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:44,030 INFO L93 Difference]: Finished difference Result 1157 states and 1253 transitions. [2018-09-30 23:27:44,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:27:44,031 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1131 [2018-09-30 23:27:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:44,032 INFO L225 Difference]: With dead ends: 1157 [2018-09-30 23:27:44,032 INFO L226 Difference]: Without dead ends: 1155 [2018-09-30 23:27:44,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 1131 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:27:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2018-09-30 23:27:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1144. [2018-09-30 23:27:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1144 states. [2018-09-30 23:27:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1239 transitions. [2018-09-30 23:27:45,496 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1239 transitions. Word has length 1131 [2018-09-30 23:27:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:45,497 INFO L480 AbstractCegarLoop]: Abstraction has 1144 states and 1239 transitions. [2018-09-30 23:27:45,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:27:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1239 transitions. [2018-09-30 23:27:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2018-09-30 23:27:45,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:45,506 INFO L375 BasicCegarLoop]: trace histogram [950, 95, 95, 1, 1, 1] [2018-09-30 23:27:45,506 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:45,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash -844977543, now seen corresponding path program 98 times [2018-09-30 23:27:45,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:45,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:45,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:45,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:45,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 550050 backedges. 0 proven. 544825 refuted. 0 times theorem prover too weak. 5225 trivial. 0 not checked. [2018-09-30 23:27:50,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:50,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:50,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:50,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:50,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:50,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 550050 backedges. 0 proven. 544825 refuted. 0 times theorem prover too weak. 5225 trivial. 0 not checked. [2018-09-30 23:27:51,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:51,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:27:51,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:27:51,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:27:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:27:51,652 INFO L87 Difference]: Start difference. First operand 1144 states and 1239 transitions. Second operand 98 states. [2018-09-30 23:27:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:53,946 INFO L93 Difference]: Finished difference Result 1169 states and 1266 transitions. [2018-09-30 23:27:53,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:27:53,946 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 1143 [2018-09-30 23:27:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:53,947 INFO L225 Difference]: With dead ends: 1169 [2018-09-30 23:27:53,948 INFO L226 Difference]: Without dead ends: 1167 [2018-09-30 23:27:53,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:27:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2018-09-30 23:27:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1156. [2018-09-30 23:27:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2018-09-30 23:27:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1252 transitions. [2018-09-30 23:27:55,363 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1252 transitions. Word has length 1143 [2018-09-30 23:27:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:55,364 INFO L480 AbstractCegarLoop]: Abstraction has 1156 states and 1252 transitions. [2018-09-30 23:27:55,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:27:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1252 transitions. [2018-09-30 23:27:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-09-30 23:27:55,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:55,374 INFO L375 BasicCegarLoop]: trace histogram [960, 96, 96, 1, 1, 1] [2018-09-30 23:27:55,374 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:55,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash -84868925, now seen corresponding path program 99 times [2018-09-30 23:27:55,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:55,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:55,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:55,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:55,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 561696 backedges. 0 proven. 556416 refuted. 0 times theorem prover too weak. 5280 trivial. 0 not checked. [2018-09-30 23:28:00,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:00,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:00,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:05,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 577 check-sat command(s) [2018-09-30 23:28:05,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:05,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 561696 backedges. 0 proven. 556416 refuted. 0 times theorem prover too weak. 5280 trivial. 0 not checked. [2018-09-30 23:28:06,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:06,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:28:06,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:28:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:28:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:28:06,526 INFO L87 Difference]: Start difference. First operand 1156 states and 1252 transitions. Second operand 99 states. [2018-09-30 23:28:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:08,688 INFO L93 Difference]: Finished difference Result 1181 states and 1279 transitions. [2018-09-30 23:28:08,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:28:08,688 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 1155 [2018-09-30 23:28:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:08,690 INFO L225 Difference]: With dead ends: 1181 [2018-09-30 23:28:08,690 INFO L226 Difference]: Without dead ends: 1179 [2018-09-30 23:28:08,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1252 GetRequests, 1155 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:28:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2018-09-30 23:28:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1168. [2018-09-30 23:28:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2018-09-30 23:28:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1265 transitions. [2018-09-30 23:28:10,207 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1265 transitions. Word has length 1155 [2018-09-30 23:28:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:10,207 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 1265 transitions. [2018-09-30 23:28:10,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:28:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1265 transitions. [2018-09-30 23:28:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2018-09-30 23:28:10,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:10,216 INFO L375 BasicCegarLoop]: trace histogram [970, 97, 97, 1, 1, 1] [2018-09-30 23:28:10,216 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:10,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:10,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1722927091, now seen corresponding path program 100 times [2018-09-30 23:28:10,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:10,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:10,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:10,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:10,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 573464 backedges. 0 proven. 568129 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2018-09-30 23:28:15,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:15,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:15,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:15,677 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:15,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:15,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 573464 backedges. 0 proven. 568129 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2018-09-30 23:28:16,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:16,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:28:16,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:28:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:28:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:28:16,657 INFO L87 Difference]: Start difference. First operand 1168 states and 1265 transitions. Second operand 100 states. [2018-09-30 23:28:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:19,090 INFO L93 Difference]: Finished difference Result 1193 states and 1292 transitions. [2018-09-30 23:28:19,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:28:19,091 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1167 [2018-09-30 23:28:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:19,092 INFO L225 Difference]: With dead ends: 1193 [2018-09-30 23:28:19,092 INFO L226 Difference]: Without dead ends: 1191 [2018-09-30 23:28:19,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1265 GetRequests, 1167 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:28:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2018-09-30 23:28:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1180. [2018-09-30 23:28:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-09-30 23:28:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1278 transitions. [2018-09-30 23:28:20,622 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1278 transitions. Word has length 1167 [2018-09-30 23:28:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:20,623 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 1278 transitions. [2018-09-30 23:28:20,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:28:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1278 transitions. [2018-09-30 23:28:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2018-09-30 23:28:20,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:20,631 INFO L375 BasicCegarLoop]: trace histogram [980, 98, 98, 1, 1, 1] [2018-09-30 23:28:20,631 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:20,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1401892777, now seen corresponding path program 101 times [2018-09-30 23:28:20,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:20,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:20,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:20,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:20,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 585354 backedges. 0 proven. 579964 refuted. 0 times theorem prover too weak. 5390 trivial. 0 not checked. [2018-09-30 23:28:25,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:25,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:25,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:30,996 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 589 check-sat command(s) [2018-09-30 23:28:30,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:31,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 585354 backedges. 0 proven. 579964 refuted. 0 times theorem prover too weak. 5390 trivial. 0 not checked. [2018-09-30 23:28:31,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:31,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:28:31,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:28:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:28:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:28:31,969 INFO L87 Difference]: Start difference. First operand 1180 states and 1278 transitions. Second operand 101 states. [2018-09-30 23:28:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:34,449 INFO L93 Difference]: Finished difference Result 1205 states and 1305 transitions. [2018-09-30 23:28:34,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:28:34,449 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 1179 [2018-09-30 23:28:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:34,451 INFO L225 Difference]: With dead ends: 1205 [2018-09-30 23:28:34,451 INFO L226 Difference]: Without dead ends: 1203 [2018-09-30 23:28:34,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1278 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:28:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2018-09-30 23:28:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1192. [2018-09-30 23:28:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2018-09-30 23:28:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1291 transitions. [2018-09-30 23:28:36,068 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1291 transitions. Word has length 1179 [2018-09-30 23:28:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:36,069 INFO L480 AbstractCegarLoop]: Abstraction has 1192 states and 1291 transitions. [2018-09-30 23:28:36,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:28:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1291 transitions. [2018-09-30 23:28:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2018-09-30 23:28:36,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:36,077 INFO L375 BasicCegarLoop]: trace histogram [990, 99, 99, 1, 1, 1] [2018-09-30 23:28:36,077 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:36,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash -632338015, now seen corresponding path program 102 times [2018-09-30 23:28:36,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:36,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:36,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:36,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:36,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 597366 backedges. 0 proven. 591921 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2018-09-30 23:28:41,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:41,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:41,146 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:46,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 590 check-sat command(s) [2018-09-30 23:28:46,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:46,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 597366 backedges. 0 proven. 591921 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2018-09-30 23:28:47,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:47,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:28:47,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:28:47,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:28:47,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:28:47,918 INFO L87 Difference]: Start difference. First operand 1192 states and 1291 transitions. Second operand 102 states. [2018-09-30 23:28:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:50,384 INFO L93 Difference]: Finished difference Result 1217 states and 1318 transitions. [2018-09-30 23:28:50,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:28:50,384 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 1191 [2018-09-30 23:28:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:50,386 INFO L225 Difference]: With dead ends: 1217 [2018-09-30 23:28:50,386 INFO L226 Difference]: Without dead ends: 1215 [2018-09-30 23:28:50,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1291 GetRequests, 1191 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:28:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2018-09-30 23:28:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1204. [2018-09-30 23:28:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2018-09-30 23:28:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1304 transitions. [2018-09-30 23:28:52,139 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1304 transitions. Word has length 1191 [2018-09-30 23:28:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:52,140 INFO L480 AbstractCegarLoop]: Abstraction has 1204 states and 1304 transitions. [2018-09-30 23:28:52,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:28:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1304 transitions. [2018-09-30 23:28:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2018-09-30 23:28:52,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:52,149 INFO L375 BasicCegarLoop]: trace histogram [1000, 100, 100, 1, 1, 1] [2018-09-30 23:28:52,149 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:52,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash 186655723, now seen corresponding path program 103 times [2018-09-30 23:28:52,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:52,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:52,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:52,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:52,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 609500 backedges. 0 proven. 604000 refuted. 0 times theorem prover too weak. 5500 trivial. 0 not checked. [2018-09-30 23:28:57,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:57,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:57,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:57,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 609500 backedges. 0 proven. 604000 refuted. 0 times theorem prover too weak. 5500 trivial. 0 not checked. [2018-09-30 23:28:58,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:58,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:28:58,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:28:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:28:58,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:28:58,796 INFO L87 Difference]: Start difference. First operand 1204 states and 1304 transitions. Second operand 103 states. [2018-09-30 23:29:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:01,170 INFO L93 Difference]: Finished difference Result 1229 states and 1331 transitions. [2018-09-30 23:29:01,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:29:01,171 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 1203 [2018-09-30 23:29:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:01,172 INFO L225 Difference]: With dead ends: 1229 [2018-09-30 23:29:01,173 INFO L226 Difference]: Without dead ends: 1227 [2018-09-30 23:29:01,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1304 GetRequests, 1203 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:29:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2018-09-30 23:29:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2018-09-30 23:29:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2018-09-30 23:29:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1317 transitions. [2018-09-30 23:29:02,921 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1317 transitions. Word has length 1203 [2018-09-30 23:29:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:02,922 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 1317 transitions. [2018-09-30 23:29:02,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:29:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1317 transitions. [2018-09-30 23:29:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2018-09-30 23:29:02,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:02,930 INFO L375 BasicCegarLoop]: trace histogram [1010, 101, 101, 1, 1, 1] [2018-09-30 23:29:02,930 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:02,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash 156884789, now seen corresponding path program 104 times [2018-09-30 23:29:02,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:02,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:02,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:02,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:02,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 621756 backedges. 0 proven. 616201 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2018-09-30 23:29:08,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:08,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:08,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:29:09,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:29:09,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:09,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 621756 backedges. 0 proven. 616201 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2018-09-30 23:29:10,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:10,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:29:10,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:29:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:29:10,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:29:10,246 INFO L87 Difference]: Start difference. First operand 1216 states and 1317 transitions. Second operand 104 states. [2018-09-30 23:29:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:12,826 INFO L93 Difference]: Finished difference Result 1241 states and 1344 transitions. [2018-09-30 23:29:12,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:29:12,827 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 1215 [2018-09-30 23:29:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:12,828 INFO L225 Difference]: With dead ends: 1241 [2018-09-30 23:29:12,828 INFO L226 Difference]: Without dead ends: 1239 [2018-09-30 23:29:12,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1215 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:29:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-09-30 23:29:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1228. [2018-09-30 23:29:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2018-09-30 23:29:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1330 transitions. [2018-09-30 23:29:14,529 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1330 transitions. Word has length 1215 [2018-09-30 23:29:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:14,530 INFO L480 AbstractCegarLoop]: Abstraction has 1228 states and 1330 transitions. [2018-09-30 23:29:14,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:29:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1330 transitions. [2018-09-30 23:29:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2018-09-30 23:29:14,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:14,538 INFO L375 BasicCegarLoop]: trace histogram [1020, 102, 102, 1, 1, 1] [2018-09-30 23:29:14,538 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:14,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 565377919, now seen corresponding path program 105 times [2018-09-30 23:29:14,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:14,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:14,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:14,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:14,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 634134 backedges. 0 proven. 628524 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2018-09-30 23:29:19,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:19,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:19,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:25,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 613 check-sat command(s) [2018-09-30 23:29:25,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:25,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 634134 backedges. 0 proven. 628524 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2018-09-30 23:29:26,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:26,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:29:26,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:29:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:29:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:29:26,780 INFO L87 Difference]: Start difference. First operand 1228 states and 1330 transitions. Second operand 105 states. [2018-09-30 23:29:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:29,328 INFO L93 Difference]: Finished difference Result 1253 states and 1357 transitions. [2018-09-30 23:29:29,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:29:29,329 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 1227 [2018-09-30 23:29:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:29,330 INFO L225 Difference]: With dead ends: 1253 [2018-09-30 23:29:29,330 INFO L226 Difference]: Without dead ends: 1251 [2018-09-30 23:29:29,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1330 GetRequests, 1227 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:29:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2018-09-30 23:29:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1240. [2018-09-30 23:29:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2018-09-30 23:29:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1343 transitions. [2018-09-30 23:29:31,027 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1343 transitions. Word has length 1227 [2018-09-30 23:29:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:31,027 INFO L480 AbstractCegarLoop]: Abstraction has 1240 states and 1343 transitions. [2018-09-30 23:29:31,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:29:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1343 transitions. [2018-09-30 23:29:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2018-09-30 23:29:31,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:31,036 INFO L375 BasicCegarLoop]: trace histogram [1030, 103, 103, 1, 1, 1] [2018-09-30 23:29:31,036 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:31,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:31,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1021183799, now seen corresponding path program 106 times [2018-09-30 23:29:31,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:31,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:31,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:31,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:31,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 646634 backedges. 0 proven. 640969 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2018-09-30 23:29:36,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:36,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:36,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:37,092 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:37,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:37,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 646634 backedges. 0 proven. 640969 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2018-09-30 23:29:38,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:38,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:29:38,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:29:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:29:38,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:29:38,245 INFO L87 Difference]: Start difference. First operand 1240 states and 1343 transitions. Second operand 106 states. [2018-09-30 23:29:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:41,026 INFO L93 Difference]: Finished difference Result 1265 states and 1370 transitions. [2018-09-30 23:29:41,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:29:41,026 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 1239 [2018-09-30 23:29:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:41,028 INFO L225 Difference]: With dead ends: 1265 [2018-09-30 23:29:41,028 INFO L226 Difference]: Without dead ends: 1263 [2018-09-30 23:29:41,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1343 GetRequests, 1239 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:29:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2018-09-30 23:29:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1252. [2018-09-30 23:29:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1252 states. [2018-09-30 23:29:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1356 transitions. [2018-09-30 23:29:42,827 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1356 transitions. Word has length 1239 [2018-09-30 23:29:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:42,828 INFO L480 AbstractCegarLoop]: Abstraction has 1252 states and 1356 transitions. [2018-09-30 23:29:42,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:29:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1356 transitions. [2018-09-30 23:29:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2018-09-30 23:29:42,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:42,837 INFO L375 BasicCegarLoop]: trace histogram [1040, 104, 104, 1, 1, 1] [2018-09-30 23:29:42,837 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:42,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 517822227, now seen corresponding path program 107 times [2018-09-30 23:29:42,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:42,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:42,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:42,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:42,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 659256 backedges. 0 proven. 653536 refuted. 0 times theorem prover too weak. 5720 trivial. 0 not checked. [2018-09-30 23:29:48,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:48,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:48,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:54,778 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 625 check-sat command(s) [2018-09-30 23:29:54,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:54,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 659256 backedges. 0 proven. 653536 refuted. 0 times theorem prover too weak. 5720 trivial. 0 not checked. [2018-09-30 23:29:55,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:55,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:29:55,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:29:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:29:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:29:55,940 INFO L87 Difference]: Start difference. First operand 1252 states and 1356 transitions. Second operand 107 states. [2018-09-30 23:29:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:58,809 INFO L93 Difference]: Finished difference Result 1277 states and 1383 transitions. [2018-09-30 23:29:58,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:29:58,809 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 1251 [2018-09-30 23:29:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:58,810 INFO L225 Difference]: With dead ends: 1277 [2018-09-30 23:29:58,810 INFO L226 Difference]: Without dead ends: 1275 [2018-09-30 23:29:58,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 1251 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:29:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2018-09-30 23:30:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1264. [2018-09-30 23:30:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2018-09-30 23:30:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1369 transitions. [2018-09-30 23:30:00,614 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1369 transitions. Word has length 1251 [2018-09-30 23:30:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:00,615 INFO L480 AbstractCegarLoop]: Abstraction has 1264 states and 1369 transitions. [2018-09-30 23:30:00,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:30:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1369 transitions. [2018-09-30 23:30:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2018-09-30 23:30:00,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:00,624 INFO L375 BasicCegarLoop]: trace histogram [1050, 105, 105, 1, 1, 1] [2018-09-30 23:30:00,624 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:00,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash -933521827, now seen corresponding path program 108 times [2018-09-30 23:30:00,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:00,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:00,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:00,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:00,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 672000 backedges. 0 proven. 666225 refuted. 0 times theorem prover too weak. 5775 trivial. 0 not checked. [2018-09-30 23:30:05,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:05,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:05,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:12,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 627 check-sat command(s) [2018-09-30 23:30:12,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:12,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 672000 backedges. 0 proven. 666225 refuted. 0 times theorem prover too weak. 5775 trivial. 0 not checked. [2018-09-30 23:30:13,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:13,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:30:13,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:30:13,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:30:13,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:30:13,463 INFO L87 Difference]: Start difference. First operand 1264 states and 1369 transitions. Second operand 108 states. [2018-09-30 23:30:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:16,272 INFO L93 Difference]: Finished difference Result 1289 states and 1396 transitions. [2018-09-30 23:30:16,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:30:16,272 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 1263 [2018-09-30 23:30:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:16,274 INFO L225 Difference]: With dead ends: 1289 [2018-09-30 23:30:16,274 INFO L226 Difference]: Without dead ends: 1287 [2018-09-30 23:30:16,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1369 GetRequests, 1263 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:30:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2018-09-30 23:30:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1276. [2018-09-30 23:30:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2018-09-30 23:30:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1382 transitions. [2018-09-30 23:30:18,106 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1382 transitions. Word has length 1263 [2018-09-30 23:30:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:18,106 INFO L480 AbstractCegarLoop]: Abstraction has 1276 states and 1382 transitions. [2018-09-30 23:30:18,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:30:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1382 transitions. [2018-09-30 23:30:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2018-09-30 23:30:18,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:18,115 INFO L375 BasicCegarLoop]: trace histogram [1060, 106, 106, 1, 1, 1] [2018-09-30 23:30:18,115 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:18,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:18,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1431516839, now seen corresponding path program 109 times [2018-09-30 23:30:18,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:18,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:18,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:18,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:18,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 684866 backedges. 0 proven. 679036 refuted. 0 times theorem prover too weak. 5830 trivial. 0 not checked. [2018-09-30 23:30:23,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:23,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:23,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:24,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 684866 backedges. 0 proven. 679036 refuted. 0 times theorem prover too weak. 5830 trivial. 0 not checked. [2018-09-30 23:30:25,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:25,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:30:25,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:30:25,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:30:25,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:30:25,692 INFO L87 Difference]: Start difference. First operand 1276 states and 1382 transitions. Second operand 109 states. [2018-09-30 23:30:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:28,386 INFO L93 Difference]: Finished difference Result 1301 states and 1409 transitions. [2018-09-30 23:30:28,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:30:28,386 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 1275 [2018-09-30 23:30:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:28,388 INFO L225 Difference]: With dead ends: 1301 [2018-09-30 23:30:28,388 INFO L226 Difference]: Without dead ends: 1299 [2018-09-30 23:30:28,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1275 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:30:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2018-09-30 23:30:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1288. [2018-09-30 23:30:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2018-09-30 23:30:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1395 transitions. [2018-09-30 23:30:30,311 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1395 transitions. Word has length 1275 [2018-09-30 23:30:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:30,312 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 1395 transitions. [2018-09-30 23:30:30,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:30:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1395 transitions. [2018-09-30 23:30:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2018-09-30 23:30:30,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:30,322 INFO L375 BasicCegarLoop]: trace histogram [1070, 107, 107, 1, 1, 1] [2018-09-30 23:30:30,322 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:30,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash -38094863, now seen corresponding path program 110 times [2018-09-30 23:30:30,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:30,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:30,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:30,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:30,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 697854 backedges. 0 proven. 691969 refuted. 0 times theorem prover too weak. 5885 trivial. 0 not checked. [2018-09-30 23:30:36,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:36,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:36,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:36,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:36,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:36,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 697854 backedges. 0 proven. 691969 refuted. 0 times theorem prover too weak. 5885 trivial. 0 not checked. [2018-09-30 23:30:37,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:37,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:30:37,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:30:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:30:37,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:30:37,935 INFO L87 Difference]: Start difference. First operand 1288 states and 1395 transitions. Second operand 110 states. [2018-09-30 23:30:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:40,732 INFO L93 Difference]: Finished difference Result 1313 states and 1422 transitions. [2018-09-30 23:30:40,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:30:40,732 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 1287 [2018-09-30 23:30:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:40,734 INFO L225 Difference]: With dead ends: 1313 [2018-09-30 23:30:40,734 INFO L226 Difference]: Without dead ends: 1311 [2018-09-30 23:30:40,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1287 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:30:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2018-09-30 23:30:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1300. [2018-09-30 23:30:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1300 states. [2018-09-30 23:30:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1408 transitions. [2018-09-30 23:30:42,696 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1408 transitions. Word has length 1287 [2018-09-30 23:30:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:42,697 INFO L480 AbstractCegarLoop]: Abstraction has 1300 states and 1408 transitions. [2018-09-30 23:30:42,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:30:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1408 transitions. [2018-09-30 23:30:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2018-09-30 23:30:42,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:42,707 INFO L375 BasicCegarLoop]: trace histogram [1080, 108, 108, 1, 1, 1] [2018-09-30 23:30:42,707 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:42,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:42,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1003002427, now seen corresponding path program 111 times [2018-09-30 23:30:42,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:42,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:42,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:42,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:42,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 710964 backedges. 0 proven. 705024 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2018-09-30 23:30:48,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:48,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:48,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:30:55,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 649 check-sat command(s) [2018-09-30 23:30:55,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:55,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 710964 backedges. 0 proven. 705024 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2018-09-30 23:30:56,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:56,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:30:56,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:30:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:30:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:30:56,845 INFO L87 Difference]: Start difference. First operand 1300 states and 1408 transitions. Second operand 111 states. [2018-09-30 23:30:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:59,879 INFO L93 Difference]: Finished difference Result 1325 states and 1435 transitions. [2018-09-30 23:30:59,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:30:59,879 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 1299 [2018-09-30 23:30:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:59,881 INFO L225 Difference]: With dead ends: 1325 [2018-09-30 23:30:59,881 INFO L226 Difference]: Without dead ends: 1323 [2018-09-30 23:30:59,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1408 GetRequests, 1299 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:30:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2018-09-30 23:31:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1312. [2018-09-30 23:31:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2018-09-30 23:31:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1421 transitions. [2018-09-30 23:31:01,843 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1421 transitions. Word has length 1299 [2018-09-30 23:31:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:01,844 INFO L480 AbstractCegarLoop]: Abstraction has 1312 states and 1421 transitions. [2018-09-30 23:31:01,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:31:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1421 transitions. [2018-09-30 23:31:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1312 [2018-09-30 23:31:01,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:01,853 INFO L375 BasicCegarLoop]: trace histogram [1090, 109, 109, 1, 1, 1] [2018-09-30 23:31:01,853 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:01,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:01,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1811111301, now seen corresponding path program 112 times [2018-09-30 23:31:01,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:01,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:01,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:01,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:01,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 724196 backedges. 0 proven. 718201 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2018-09-30 23:31:07,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:07,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:07,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:08,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:08,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:08,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 724196 backedges. 0 proven. 718201 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2018-09-30 23:31:09,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:09,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:31:09,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:31:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:31:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:31:09,449 INFO L87 Difference]: Start difference. First operand 1312 states and 1421 transitions. Second operand 112 states. [2018-09-30 23:31:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:12,439 INFO L93 Difference]: Finished difference Result 1337 states and 1448 transitions. [2018-09-30 23:31:12,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:31:12,439 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 1311 [2018-09-30 23:31:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:12,441 INFO L225 Difference]: With dead ends: 1337 [2018-09-30 23:31:12,441 INFO L226 Difference]: Without dead ends: 1335 [2018-09-30 23:31:12,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1421 GetRequests, 1311 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:31:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2018-09-30 23:31:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1324. [2018-09-30 23:31:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2018-09-30 23:31:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1434 transitions. [2018-09-30 23:31:14,452 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1434 transitions. Word has length 1311 [2018-09-30 23:31:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:14,453 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 1434 transitions. [2018-09-30 23:31:14,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:31:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1434 transitions. [2018-09-30 23:31:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2018-09-30 23:31:14,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:14,462 INFO L375 BasicCegarLoop]: trace histogram [1100, 110, 110, 1, 1, 1] [2018-09-30 23:31:14,462 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:14,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:14,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1827766735, now seen corresponding path program 113 times [2018-09-30 23:31:14,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:14,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:14,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:14,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:14,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 737550 backedges. 0 proven. 731500 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-09-30 23:31:20,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:20,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:20,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:31:27,795 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 661 check-sat command(s) [2018-09-30 23:31:27,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:27,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 737550 backedges. 0 proven. 731500 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-09-30 23:31:29,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:29,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:31:29,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:31:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:31:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:31:29,054 INFO L87 Difference]: Start difference. First operand 1324 states and 1434 transitions. Second operand 113 states. [2018-09-30 23:31:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:32,131 INFO L93 Difference]: Finished difference Result 1349 states and 1461 transitions. [2018-09-30 23:31:32,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:31:32,131 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 1323 [2018-09-30 23:31:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:32,133 INFO L225 Difference]: With dead ends: 1349 [2018-09-30 23:31:32,133 INFO L226 Difference]: Without dead ends: 1347 [2018-09-30 23:31:32,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1434 GetRequests, 1323 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:31:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2018-09-30 23:31:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1336. [2018-09-30 23:31:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2018-09-30 23:31:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1447 transitions. [2018-09-30 23:31:34,279 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1447 transitions. Word has length 1323 [2018-09-30 23:31:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:34,280 INFO L480 AbstractCegarLoop]: Abstraction has 1336 states and 1447 transitions. [2018-09-30 23:31:34,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:31:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1447 transitions. [2018-09-30 23:31:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2018-09-30 23:31:34,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:34,290 INFO L375 BasicCegarLoop]: trace histogram [1110, 111, 111, 1, 1, 1] [2018-09-30 23:31:34,291 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:34,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1069123353, now seen corresponding path program 114 times [2018-09-30 23:31:34,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:34,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:34,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:34,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:34,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 751026 backedges. 0 proven. 744921 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2018-09-30 23:31:40,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:40,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:40,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:31:48,259 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 662 check-sat command(s) [2018-09-30 23:31:48,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:48,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 751026 backedges. 0 proven. 744921 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2018-09-30 23:31:49,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:49,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:31:49,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:31:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:31:49,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:31:49,481 INFO L87 Difference]: Start difference. First operand 1336 states and 1447 transitions. Second operand 114 states. [2018-09-30 23:31:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:52,595 INFO L93 Difference]: Finished difference Result 1361 states and 1474 transitions. [2018-09-30 23:31:52,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:31:52,596 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 1335 [2018-09-30 23:31:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:52,597 INFO L225 Difference]: With dead ends: 1361 [2018-09-30 23:31:52,597 INFO L226 Difference]: Without dead ends: 1359 [2018-09-30 23:31:52,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1335 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:31:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-09-30 23:31:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1348. [2018-09-30 23:31:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2018-09-30 23:31:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1460 transitions. [2018-09-30 23:31:54,727 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1460 transitions. Word has length 1335 [2018-09-30 23:31:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:54,728 INFO L480 AbstractCegarLoop]: Abstraction has 1348 states and 1460 transitions. [2018-09-30 23:31:54,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:31:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1460 transitions. [2018-09-30 23:31:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2018-09-30 23:31:54,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:54,738 INFO L375 BasicCegarLoop]: trace histogram [1120, 112, 112, 1, 1, 1] [2018-09-30 23:31:54,738 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:54,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1484657309, now seen corresponding path program 115 times [2018-09-30 23:31:54,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:54,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:54,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:54,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:54,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 764624 backedges. 0 proven. 758464 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2018-09-30 23:32:00,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:00,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:00,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:01,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 764624 backedges. 0 proven. 758464 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2018-09-30 23:32:02,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:02,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:32:02,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:32:02,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:32:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:32:02,909 INFO L87 Difference]: Start difference. First operand 1348 states and 1460 transitions. Second operand 115 states. [2018-09-30 23:32:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:06,274 INFO L93 Difference]: Finished difference Result 1373 states and 1487 transitions. [2018-09-30 23:32:06,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:32:06,274 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 1347 [2018-09-30 23:32:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:06,276 INFO L225 Difference]: With dead ends: 1373 [2018-09-30 23:32:06,276 INFO L226 Difference]: Without dead ends: 1371 [2018-09-30 23:32:06,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:32:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2018-09-30 23:32:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2018-09-30 23:32:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2018-09-30 23:32:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1473 transitions. [2018-09-30 23:32:08,459 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1473 transitions. Word has length 1347 [2018-09-30 23:32:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:08,460 INFO L480 AbstractCegarLoop]: Abstraction has 1360 states and 1473 transitions. [2018-09-30 23:32:08,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:32:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1473 transitions. [2018-09-30 23:32:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2018-09-30 23:32:08,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:08,470 INFO L375 BasicCegarLoop]: trace histogram [1130, 113, 113, 1, 1, 1] [2018-09-30 23:32:08,470 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:08,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash -910084947, now seen corresponding path program 116 times [2018-09-30 23:32:08,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:08,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:08,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:08,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:08,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 778344 backedges. 0 proven. 772129 refuted. 0 times theorem prover too weak. 6215 trivial. 0 not checked. [2018-09-30 23:32:14,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:14,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:14,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:15,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:15,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:15,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 778344 backedges. 0 proven. 772129 refuted. 0 times theorem prover too weak. 6215 trivial. 0 not checked. [2018-09-30 23:32:16,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:16,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:32:16,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:32:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:32:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:32:16,510 INFO L87 Difference]: Start difference. First operand 1360 states and 1473 transitions. Second operand 116 states. [2018-09-30 23:32:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:19,726 INFO L93 Difference]: Finished difference Result 1385 states and 1500 transitions. [2018-09-30 23:32:19,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:32:19,726 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 1359 [2018-09-30 23:32:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:19,727 INFO L225 Difference]: With dead ends: 1385 [2018-09-30 23:32:19,727 INFO L226 Difference]: Without dead ends: 1383 [2018-09-30 23:32:19,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1473 GetRequests, 1359 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:32:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2018-09-30 23:32:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1372. [2018-09-30 23:32:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2018-09-30 23:32:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1486 transitions. [2018-09-30 23:32:21,883 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1486 transitions. Word has length 1359 [2018-09-30 23:32:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:21,883 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 1486 transitions. [2018-09-30 23:32:21,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:32:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1486 transitions. [2018-09-30 23:32:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2018-09-30 23:32:21,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:21,893 INFO L375 BasicCegarLoop]: trace histogram [1140, 114, 114, 1, 1, 1] [2018-09-30 23:32:21,894 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:21,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash -835855113, now seen corresponding path program 117 times [2018-09-30 23:32:21,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:21,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:21,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:21,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:21,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 792186 backedges. 0 proven. 785916 refuted. 0 times theorem prover too weak. 6270 trivial. 0 not checked. [2018-09-30 23:32:28,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:28,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:28,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:35,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 685 check-sat command(s) [2018-09-30 23:32:35,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:35,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 792186 backedges. 0 proven. 785916 refuted. 0 times theorem prover too weak. 6270 trivial. 0 not checked. [2018-09-30 23:32:37,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:37,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:32:37,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:32:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:32:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:32:37,134 INFO L87 Difference]: Start difference. First operand 1372 states and 1486 transitions. Second operand 117 states. [2018-09-30 23:32:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:40,503 INFO L93 Difference]: Finished difference Result 1397 states and 1513 transitions. [2018-09-30 23:32:40,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:32:40,503 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 1371 [2018-09-30 23:32:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:40,505 INFO L225 Difference]: With dead ends: 1397 [2018-09-30 23:32:40,505 INFO L226 Difference]: Without dead ends: 1395 [2018-09-30 23:32:40,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1371 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:32:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2018-09-30 23:32:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1384. [2018-09-30 23:32:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-09-30 23:32:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1499 transitions. [2018-09-30 23:32:42,778 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1499 transitions. Word has length 1371 [2018-09-30 23:32:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:42,778 INFO L480 AbstractCegarLoop]: Abstraction has 1384 states and 1499 transitions. [2018-09-30 23:32:42,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:32:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1499 transitions. [2018-09-30 23:32:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1384 [2018-09-30 23:32:42,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:42,789 INFO L375 BasicCegarLoop]: trace histogram [1150, 115, 115, 1, 1, 1] [2018-09-30 23:32:42,789 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:42,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2126407233, now seen corresponding path program 118 times [2018-09-30 23:32:42,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:42,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:42,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:42,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:42,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 806150 backedges. 0 proven. 799825 refuted. 0 times theorem prover too weak. 6325 trivial. 0 not checked. [2018-09-30 23:32:49,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:49,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:49,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:32:50,167 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:32:50,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:50,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 806150 backedges. 0 proven. 799825 refuted. 0 times theorem prover too weak. 6325 trivial. 0 not checked. [2018-09-30 23:32:51,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:51,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:32:51,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:32:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:32:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:32:51,450 INFO L87 Difference]: Start difference. First operand 1384 states and 1499 transitions. Second operand 118 states. [2018-09-30 23:32:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:54,706 INFO L93 Difference]: Finished difference Result 1409 states and 1526 transitions. [2018-09-30 23:32:54,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:32:54,707 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 1383 [2018-09-30 23:32:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:54,708 INFO L225 Difference]: With dead ends: 1409 [2018-09-30 23:32:54,709 INFO L226 Difference]: Without dead ends: 1407 [2018-09-30 23:32:54,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1383 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:32:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2018-09-30 23:32:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1396. [2018-09-30 23:32:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2018-09-30 23:32:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1512 transitions. [2018-09-30 23:32:57,088 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1512 transitions. Word has length 1383 [2018-09-30 23:32:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:57,089 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 1512 transitions. [2018-09-30 23:32:57,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:32:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1512 transitions. [2018-09-30 23:32:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2018-09-30 23:32:57,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:57,099 INFO L375 BasicCegarLoop]: trace histogram [1160, 116, 116, 1, 1, 1] [2018-09-30 23:32:57,099 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:57,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash -408334197, now seen corresponding path program 119 times [2018-09-30 23:32:57,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:57,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 820236 backedges. 0 proven. 813856 refuted. 0 times theorem prover too weak. 6380 trivial. 0 not checked. [2018-09-30 23:33:03,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:03,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:03,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:11,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 697 check-sat command(s) [2018-09-30 23:33:11,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:11,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 820236 backedges. 0 proven. 813856 refuted. 0 times theorem prover too weak. 6380 trivial. 0 not checked. [2018-09-30 23:33:12,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:12,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:33:12,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:33:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:33:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:33:12,906 INFO L87 Difference]: Start difference. First operand 1396 states and 1512 transitions. Second operand 119 states. [2018-09-30 23:33:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:16,311 INFO L93 Difference]: Finished difference Result 1421 states and 1539 transitions. [2018-09-30 23:33:16,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:33:16,312 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 1395 [2018-09-30 23:33:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:16,313 INFO L225 Difference]: With dead ends: 1421 [2018-09-30 23:33:16,313 INFO L226 Difference]: Without dead ends: 1419 [2018-09-30 23:33:16,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1512 GetRequests, 1395 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:33:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2018-09-30 23:33:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1408. [2018-09-30 23:33:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2018-09-30 23:33:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1525 transitions. [2018-09-30 23:33:18,627 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1525 transitions. Word has length 1395 [2018-09-30 23:33:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:18,627 INFO L480 AbstractCegarLoop]: Abstraction has 1408 states and 1525 transitions. [2018-09-30 23:33:18,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:33:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1525 transitions. [2018-09-30 23:33:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1408 [2018-09-30 23:33:18,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:18,638 INFO L375 BasicCegarLoop]: trace histogram [1170, 117, 117, 1, 1, 1] [2018-09-30 23:33:18,638 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:18,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash -144368683, now seen corresponding path program 120 times [2018-09-30 23:33:18,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:18,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:18,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:18,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:18,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 834444 backedges. 0 proven. 828009 refuted. 0 times theorem prover too weak. 6435 trivial. 0 not checked. [2018-09-30 23:33:25,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:25,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:25,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:33,620 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 699 check-sat command(s) [2018-09-30 23:33:33,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:33,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 834444 backedges. 0 proven. 828009 refuted. 0 times theorem prover too weak. 6435 trivial. 0 not checked. [2018-09-30 23:33:35,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:35,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:33:35,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:33:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:33:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:33:35,069 INFO L87 Difference]: Start difference. First operand 1408 states and 1525 transitions. Second operand 120 states. [2018-09-30 23:33:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:38,744 INFO L93 Difference]: Finished difference Result 1433 states and 1552 transitions. [2018-09-30 23:33:38,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:33:38,744 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 1407 [2018-09-30 23:33:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:38,746 INFO L225 Difference]: With dead ends: 1433 [2018-09-30 23:33:38,746 INFO L226 Difference]: Without dead ends: 1431 [2018-09-30 23:33:38,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1407 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:33:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2018-09-30 23:33:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1420. [2018-09-30 23:33:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1420 states. [2018-09-30 23:33:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1538 transitions. [2018-09-30 23:33:41,346 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1538 transitions. Word has length 1407 [2018-09-30 23:33:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:41,347 INFO L480 AbstractCegarLoop]: Abstraction has 1420 states and 1538 transitions. [2018-09-30 23:33:41,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:33:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1538 transitions. [2018-09-30 23:33:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2018-09-30 23:33:41,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:41,357 INFO L375 BasicCegarLoop]: trace histogram [1180, 118, 118, 1, 1, 1] [2018-09-30 23:33:41,357 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:41,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash 514344991, now seen corresponding path program 121 times [2018-09-30 23:33:41,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:41,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:41,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:41,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:41,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 848774 backedges. 0 proven. 842284 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2018-09-30 23:33:48,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:48,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:48,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:48,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 848774 backedges. 0 proven. 842284 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2018-09-30 23:33:50,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:50,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:33:50,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:33:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:33:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:33:50,400 INFO L87 Difference]: Start difference. First operand 1420 states and 1538 transitions. Second operand 121 states. [2018-09-30 23:33:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:53,978 INFO L93 Difference]: Finished difference Result 1445 states and 1565 transitions. [2018-09-30 23:33:53,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:33:53,979 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 1419 [2018-09-30 23:33:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:53,981 INFO L225 Difference]: With dead ends: 1445 [2018-09-30 23:33:53,981 INFO L226 Difference]: Without dead ends: 1443 [2018-09-30 23:33:53,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1419 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:33:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2018-09-30 23:33:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1432. [2018-09-30 23:33:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-09-30 23:33:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1551 transitions. [2018-09-30 23:33:56,389 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1551 transitions. Word has length 1419 [2018-09-30 23:33:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:56,389 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 1551 transitions. [2018-09-30 23:33:56,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:33:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1551 transitions. [2018-09-30 23:33:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1432 [2018-09-30 23:33:56,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:56,401 INFO L375 BasicCegarLoop]: trace histogram [1190, 119, 119, 1, 1, 1] [2018-09-30 23:33:56,401 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:56,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:56,402 INFO L82 PathProgramCache]: Analyzing trace with hash -261532311, now seen corresponding path program 122 times [2018-09-30 23:33:56,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:56,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:56,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:56,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:56,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:33:58,310 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:33:58,314 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:33:58,314 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:33:58 BoogieIcfgContainer [2018-09-30 23:33:58,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:33:58,315 INFO L168 Benchmark]: Toolchain (without parser) took 803677.48 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 335.0 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-30 23:33:58,317 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:33:58,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:33:58,317 INFO L168 Benchmark]: Boogie Preprocessor took 20.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:33:58,317 INFO L168 Benchmark]: RCFGBuilder took 347.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:33:58,318 INFO L168 Benchmark]: TraceAbstraction took 803262.27 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 313.9 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-30 23:33:58,320 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 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 347.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 803262.27 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 313.9 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was analyzing trace of length 1432 with TraceHistMax 1190, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 67 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 803.1s OverallTime, 124 OverallIterations, 1190 TraceHistogramMax, 154.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 490 SDtfs, 14274 SDslu, 9548 SDs, 0 SdLazy, 17005 SolverSat, 620 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91970 GetRequests, 84566 SyntacticMatches, 0 SemanticMatches, 7404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 239.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1432occurred in iteration=123, 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: 90.7s AutomataMinimizationTime, 123 MinimizatonAttempts, 1280 StatesRemovedByMinimization, 119 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 10.3s SsaConstructionTime, 181.9s SatisfiabilityAnalysisTime, 306.7s InterpolantComputationTime, 169202 NumberOfCodeBlocks, 168969 NumberOfCodeBlocksAsserted, 21287 NumberOfCheckSat, 168958 ConstructedInterpolants, 0 QuantifiedInterpolants, 480873496 SizeOfPredicates, 121 NumberOfNonLiveVariables, 338418 ConjunctsInSsa, 7287 ConjunctsInUnsatCore, 244 InterpolantComputations, 2 PerfectInterpolantSequences, 774793/67595165 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-33-58-328.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-33-58-328.csv Completed graceful shutdown